# Feline Dystocia: Diagnosis and Management


## Key Takeaways

- Feline dystocia is a time-sensitive emergency requiring prompt, structured decision-making, with intervention indicated if Stage II labor exceeds 2-4 hours without fetal expulsion or if active straining persists for >30-60 minutes without delivery.
- Diagnostic imaging, particularly radiography for fetal number/size and ultrasonography for fetal heart rate (normal 180-240 bpm, <160 bpm indicates distress), is critical for differentiating obstructive from ineffective labor and assessing fetal viability.
- Medical management, primarily utilizing calcium gluconate and oxytocin, is contraindicated in obstructive dystocia or fetal distress; it is reserved for primary uterine inertia with normal fetal heart rates and a patent birth canal.
- Immediate cesarean section is indicated for gestation exceeding 68 days without labor, persistent strong straining without expulsion, visible fetal parts not delivered within 15 minutes, purulent/hemorrhagic vaginal discharge, or maternal systemic compromise.
- Breed-specific reproductive data, such as litter size and stillbirth rates (approaching 10-12% in some pedigree populations), are essential for risk assessment and counseling, with brachycephalic and large-headed breeds potentially at higher risk.
- Serial fetal heart rate monitoring is the most reliable indicator of fetal well-being during labor, with rates below 180 bpm warranting reassessment and rates below 160 bpm indicating fetal distress necessitating immediate surgical intervention.

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Dystocia in the queen is a time-sensitive emergency that demands structured decision-making. This article provides a diagnostic framework for the practicing veterinarian, covering the physiologic basis of feline parturition, criteria for diagnosing obstructed or ineffective labor, and the medical and surgical options available once intervention is warranted. It is written for clinicians who manage feline reproduction in general or referral practice and who require a practical, evidence-informed approach to a common obstetric emergency.

The clinical question at the center of this reference is straightforward: when does normal labor become dystocia, and what is the most appropriate intervention at each stage? Answering that question requires familiarity with breed-specific reproductive patterns, the pharmacology of uterotonic agents, and the surgical considerations that differ between cats and other small animals. The guidance that follows integrates published reproductive data with established theriogenology resources, and it flags areas where the evidence base remains limited.

## At a Glance

| Parameter | Clinical Relevance |
|---|---|
| Normal gestation length | 59 to 76 days reported across breeds, with breed-specific variation |
| Stage I labor duration | Typically 6 to 12 hours, prolonged stage I warrants assessment |
| Stage II labor | Active straining with fetal expulsion, intervention indicated if ineffective after 2 to 4 hours |
| Fetal heart rate | Normal range approximately 180 to 240 bpm, bradycardia below 160 bpm indicates fetal distress |
| Stillbirth risk | Increases with queen age and litter size, breed differences reported |
| Cesarean rate in queens | Approximately 7% of litters in one Swedish breeding population |
| Medical management | Calcium and oxytocin protocols, with contraindications for obstructive dystocia |
| Surgical threshold | Failure of medical management, fetal distress, or confirmed obstruction |

## Physiology of Feline Parturition

Feline labor proceeds through the same three stages recognized in other domestic carnivores, but the timing and clinical presentation differ in ways that matter for intervention decisions. Stage I is characterized by uterine contractions without visible straining, cervical dilation, and maternal restlessness or nesting behavior. Stage II begins with active abdominal straining and ends with expulsion of the fetus. Stage III involves passage of the fetal membranes, which in the queen frequently accompanies the birth of the next kitten instead of occurring as a separate event after each delivery.

The queen typically delivers her litter over a period of several hours, with intervals between kittens ranging from roughly 15 minutes to 2 hours. Intervals longer than 2 to 3 hours between kittens, or active straining for more than 30 to 60 minutes without fetal expulsion, should raise suspicion of dystocia. Breed-specific data from questionnaire-based studies in European breeding populations report mean litter sizes between 3.7 and 4.2 kittens, with stillbirth rates approaching 10 to 12 percent and kitten mortality from birth to weaning ranging from 8 to 14 percent [Swedish breeding cat population study](https://pubmed.ncbi.nlm.nih.gov/19254857/) [Fertility parameters in pedigree cats in Italy](https://pubmed.ncbi.nlm.nih.gov/30724695/). These figures provide a baseline against which an individual queen's labor can be judged.

## Causes of Dystocia in the Queen

### Maternal Causes

Uterine inertia is the most common maternal cause of feline dystocia. Primary uterine inertia occurs when the uterus fails to initiate effective contractions despite a normal fetus and birth canal. Secondary uterine inertia follows prolonged, ineffective straining that exhausts the myometrium, often in the presence of an obstruction. Breed predisposition has been suggested, particularly in brachycephalic breeds, although controlled comparative data are sparse.

Obstructive maternal causes include pelvic canal abnormalities, such as prior pelvic fracture malunion, and vaginal or vestibular strictures. Uterine torsion and uterine rupture are rare but should be considered when the queen fails to progress despite apparently normal anatomy.

### Fetal Causes

Fetal malposition, fetal oversize relative to the maternal pelvis, and fetal malformation account for a substantial proportion of obstructive dystocias. Fetal death with emphysema can also obstruct delivery. Breed-specific differences in litter size and stillbirth rates, reported in the Italian questionnaire study, suggest that some breeds may be at higher risk for fetal-related dystocia [Fertility parameters in pedigree cats in Italy](https://pubmed.ncbi.nlm.nih.gov/30724695/).

## Diagnosis and Assessment

### History and Signalment

The initial assessment should establish the queen's parity, breeding dates, prior reproductive history, and the onset and progression of labor. Primiparous queens are overrepresented in some dystocia series, although the evidence base for this claim in cats is less robust than in dogs. The queen's age matters because stillbirth rates increase with maternal age [Swedish breeding cat population study](https://pubmed.ncbi.nlm.nih.gov/19254857/).

### Physical Examination

A complete physical examination should precede any vaginal assessment. The queen's hydration status, mucous membrane color, heart rate, and temperature provide a baseline for anesthetic risk if surgery becomes necessary. Abdominal palpation can estimate fetal number and position, but it is unreliable for detecting fetal distress.

Vaginal examination, performed with a lubricated gloved finger or a sterile otoscope cone, assesses cervical dilation, fetal presentation, and the presence of an obstructing fetus or membrane. The vaginal canal in the queen is narrow, and excessive manipulation can cause trauma or reflex straining that complicates the assessment.

### Diagnostic Imaging

Radiography confirms fetal number, fetal size relative to the pelvic canal, and the presence of fetal malformation or emphysema. It does not assess fetal viability. Ultrasonography provides real-time assessment of fetal heart rate and myocardial contractility, and it can detect placental separation. Fetal heart rates below approximately 160 bpm are considered indicative of fetal distress and support prompt intervention [Surgical management of canine and feline dystocia](https://pubmed.ncbi.nlm.nih.gov/18495232/).

## Pharmacologic Basis of Medical Management

Medical management of uterine inertia relies on uterotonic agents, principally calcium and oxytocin. Calcium is required for myometrial contraction, and hypocalcemia can contribute to ineffective labor. Oxytocin increases the frequency and amplitude of uterine contractions, but its use is contraindicated when obstruction is present, when the uterus is already contracting vigorously, or when fetal distress is documented. The pharmacologic options for dystocia management have expanded over recent decades, with alternative agents offering improved efficacy and safety profiles compared with older protocols [Pharmacologic advances in canine and feline reproduction](https://pubmed.ncbi.nlm.nih.gov/19501345/). Current formularies and label references must be consulted for specific doses and administration guidelines, as published protocols vary and individual patient factors influence drug selection.

The decision to use medical management rests on three criteria: the queen is not obstructed, uterine contractions are weak or infrequent, and fetal heart rates remain within acceptable limits. If these criteria are met, a trial of medical therapy is reasonable. If the queen fails to deliver within a defined period after medical intervention, or if fetal distress develops, surgical delivery is indicated [Surgical management of canine and feline dystocia](https://pubmed.ncbi.nlm.nih.gov/18495232/).

## Decision Framework for Intervention

The decision to intervene in feline labor rests on a small number of objective findings: stage duration, fetal position, fetal heart rate, and maternal status. A structured approach reduces the risk of both unnecessary surgery and delayed intervention.

### Indications for Immediate Cesarean Section

Proceed directly to surgery when any of the following are present:

- Gestation length exceeds 68 days from mating or 66 days from ovulation, with no onset of labor
- Second-stage labor exceeds 2 to 4 hours without fetal expulsion
- Strong, frequent abdominal straining continues for more than 30 to 60 minutes without producing a kitten
- A fetus is visible at the vulva but is not delivered after 15 minutes of active straining
- Fetal heart rate is below 180 beats per minute, or is irregular
- Fetal membranes are visible with no fetal parts engaged
- Vaginal discharge is purulent, hemorrhagic, or malodorous
- The queen shows systemic signs such as fever, depression, or shock
- A previous cesarean section has been performed for obstructive dystocia

### Indications for Medical Management

Medical therapy is appropriate only when the following criteria are met:

- The queen is systemically stable, with normal temperature, mucous membrane color, and hydration
- No obstructive cause is identified on vaginal examination or imaging
- Uterine inertia is confirmed as primary, not secondary to obstruction
- Fetal heart rates are normal
- The cervix is fully dilated
- No fetus is malpositioned or oversized

When these criteria are satisfied, a trial of medical management with calcium and oxytocin is reasonable. The response to therapy should be assessed within 30 to 60 minutes. Failure to progress after two oxytocin doses warrants surgical intervention.

### Decision Tree for Intervention

| Clinical Finding | Action | Rationale |
|---|---|---|
| Normal labor, < 2 hours stage II, no fetal distress | Observe | Most queens deliver without assistance |
| Stage II > 2 hours, no fetal distress | Vaginal examination, imaging | Rule out obstruction before medical therapy |
| Stage II > 4 hours, or fetal distress | Cesarean section | Prolonged labor increases fetal mortality |
| Obstructive dystocia confirmed | Cesarean section | Medical therapy is contraindicated |
| Primary uterine inertia, no obstruction, normal fetal heart rates | Medical management trial | May avoid surgery if responsive |
| No response to medical therapy within 60 minutes | Cesarean section | Delayed surgery worsens outcomes |
| Fetal heart rate < 180 bpm | Cesarean section | Indicates fetal compromise |

The necessity of surgery is primarily based on the condition of the dam, progression of labor, and fetal heart rate, as described in reviews of surgical management of canine and feline dystocia. Timely intervention is crucial for optimal fetal and maternal survival.

## Pharmacologic Agents in Feline Dystocia

Medical management of primary uterine inertia relies on two principal agents: calcium and oxytocin. Both require careful patient selection and monitoring.

### Calcium

Calcium gluconate is administered slowly to improve uterine contractility. It is given before oxytocin in most protocols because hypocalcemia impairs the uterine response to oxytocin. The queen should be monitored for arrhythmias, tremors, and vomiting during administration. Current formulary references must be consulted for dose and rate of administration.

### Oxytocin

Oxytocin is administered after calcium supplementation. It stimulates uterine smooth muscle contraction. The drug should be used only after obstruction has been excluded. Repeated dosing without progress is inappropriate and risks uterine fatigue, fetal compromise, and uterine rupture.

### Pharmacologic Comparison

| Agent | Indication | Contraindications | Monitoring |
|---|---|---|---|
| Calcium gluconate | Suspected hypocalcemia, weak uterine contractions | Cardiac disease, hypercalcemia | Cardiac auscultation, tremor assessment |
| Oxytocin | Primary uterine inertia after calcium | Obstructive dystocia, fetal distress, uterine rupture | Frequency and strength of contractions, fetal heart rate |
| Prostaglandin F2 alpha | Not routinely used in dystocia | Pregnancy, obstructive dystocia | Not recommended for this indication |
| Corticosteroids | Not indicated for feline dystocia | None relevant | None |

Pharmacologic advances in canine and feline reproduction have widened the spectrum of therapeutic options for reproductive emergencies, but the evidence base for medical management of feline dystocia remains limited. The same review notes that alternative drug treatments with fewer side effects and improved efficacy are available for some reproductive conditions, yet oxytocin and calcium remain the standard agents for uterine inertia.

## Surgical Management

When medical management fails or is contraindicated, cesarean section is the definitive treatment. The procedure is described in detail in surgical reviews of canine and feline dystocia.

### Preoperative Preparation

Stabilize the queen with intravenous fluids before induction. Oxygen supplementation is beneficial. Anesthetic protocols should minimize fetal respiratory depression. Options include opioid premedication, induction with propofol, and maintenance with inhalant anesthesia at the lowest effective concentration. Local anesthetic techniques may reduce inhalant requirements.

### Surgical Technique

A midline celiotomy is standard. The uterus is exteriorized and packed off with laparotomy sponges. A single uterine incision along the greater curvature of each horn allows delivery of all kittens. Each kitten is passed to an assistant for resuscitation while the placenta is removed. The uterine incision is closed in a single layer with absorbable suture in a continuous pattern. The abdomen is lavaged and closed routinely.

### Postoperative Care

Postoperative analgesia is essential. Opioids are preferred because nonsteroidal anti-inflammatory drugs may affect platelet function and renal perfusion in the postpartum queen. The kittens should be allowed to nurse as soon as the queen is recovered enough to tolerate them. Monitor the queen for hemorrhage, metritis, and incisional complications.

## Breed-Specific Considerations

Breed influences both the risk of dystocia and the expected litter size. Questionnaire-based studies of breeding cats in Italy found that pregnancy length and litter size differ among breeds, with Norwegian Forest Cats showing larger litters associated with shorter pregnancy length. The same study reported an average stillbirth rate of 11.8% across breeds.

A Swedish questionnaire study reported a mean litter size of 3.7 kittens, with 9.7% stillbirths and 8.3% kitten mortality in weeks 1 to 12. Stillbirth rates increased with queen age and litter size, and differed among breeds. Seven percent of litters were delivered by cesarean section, with higher rates during winter and in litters containing stillborn kittens.

These findings support breed-specific counseling. Brachycephalic breeds may have higher dystocia risk due to fetal oversize relative to the maternal pelvis. Breeds with large fetal heads, such as Persians, warrant closer monitoring during labor.

## Monitoring Parameters

Fetal heart rate is the most reliable indicator of fetal well-being during labor. Normal fetal heart rate in the queen is 200 to 260 beats per minute. Rates below 180 bpm indicate fetal distress. Intermittent auscultation with Doppler ultrasound is practical in the clinical setting.

Maternal monitoring includes temperature, heart rate, respiratory rate, mucous membrane color, and hydration status. Temperature may drop below 37.8 degrees Celsius in the 24 hours before labor, but a rising temperature during labor suggests infection or inflammation.

Uterine contraction frequency and strength are assessed by palpation or observation. Contractions should be strong and regular during stage II. Weak or infrequent contractions suggest primary uterine inertia. Contractions that cease after a period of strong straining suggest obstruction or uterine fatigue.

Documentation should include the time of each examination, fetal heart rates, contraction quality, any medications administered with doses and times, and the outcome of each kitten. This record supports clinical decisions and provides a basis for future breeding recommendations.

## Recognized Complications and Failure Modes

Medical management of feline dystocia fails when the underlying cause is obstructive, when uterine inertia is primary and refractory, or when fetal or maternal compromise has already progressed past a reversible threshold. The most common failure mode is delayed decision making: repeated oxytocin administration in the face of partial obstruction, or continued medical therapy when fetal heart rate monitoring indicates distress. Serial fetal heart rate assessment is the single most useful discriminator. A fetal heart rate below 180 beats per minute in a queen with active uterine contractions warrants immediate reassessment of the delivery plan, and rates below 160 bpm are grounds for emergency cesarean section.

Uterine rupture is an uncommon but catastrophic complication. It should be suspected when a queen with prolonged labor develops acute deterioration, abdominal distension, or signs of peritonitis. Ultrasonographic findings may include free abdominal fluid, loss of uterine contour, or fetuses within the peritoneal cavity. Radiography may demonstrate fetal skeletons outside the uterine silhouette, but ultrasound is more sensitive for early detection.

Postpartum metritis and retained fetal membranes occur more frequently after assisted deliveries and prolonged labor. Queens typically present with lethargy, anorexia, fever, and a malodorous or hemorrhagic vaginal discharge. Ultrasonography may reveal a fluid-filled uterus with thickened walls. Early recognition matters because systemic sepsis can develop rapidly in the queen.

Fetal compromise that is not detected before delivery results in stillbirth or neonatal death. Breed-level data indicate that stillbirth rates approach 10 to 12 percent in some pedigree populations, and kitten mortality between birth and weaning is reported at 8 to 14 percent depending on breed and management. These figures underscore the need for rigorous intrapartum monitoring instead of a passive waiting approach.

## Common Errors and Corrective Actions

A frequent error is mistaking the end of stage one labor for a problem. Queens may appear restless, vocalise, or hide for up to 24 hours before active straining begins. Clinicians who intervene during this phase with oxytocin risk inducing tetanic contractions against a closed cervix. The discriminating check is the absence of abdominal straining and the presence of a dilated cervix on vaginal examination.

Another error is the assumption that a queen with strong abdominal efforts must be obstructed. Primary uterine inertia produces the same clinical picture: the queen strains, but contractions are weak, infrequent, or uncoordinated. Palpation of the uterus per abdomen, ultrasonographic assessment of contraction frequency, and response to a single low dose of calcium gluconate help distinguish inertia from obstruction. If the queen does not deliver within 30 to 60 minutes of calcium administration, reassess before proceeding to oxytocin.

A third error is the routine use of oxytocin without prior calcium supplementation. Hypocalcemia is a recognized contributor to uterine inertia in the queen, and oxytocin is less effective in a hypocalcemic myometrium. The pharmacologic interaction between calcium and oxytocin is well established in companion animal reproduction. Current formulary references should be consulted for dosing and administration routes.

Finally, inexperienced clinicians may underestimate the value of fetal heart rate monitoring and rely instead on elapsed time since the first kitten. Time alone is a poor predictor of outcome. The decision to proceed to surgery should integrate fetal heart rate, maternal condition, progression of labor, and the results of imaging.

## Troubleshooting Table

| Observation | Likely Cause | Discriminating Check |
|---|---|---|
| Queen restless, no straining | Stage one labor | Cervical dilation on vaginal examination |
| Strong straining, no delivery | Obstructive dystocia or uterine inertia | Vaginal examination for fetal presentation, ultrasound for fetal heart rate |
| No response to calcium and oxytocin | Primary uterine inertia refractory to medical therapy | No fetal progression after 60 minutes, consider cesarean section |
| Fetal heart rate below 180 bpm | Fetal distress | Serial monitoring, prepare for surgery |
| Acute deterioration after prolonged labor | Uterine rupture | Ultrasound for free abdominal fluid or fetuses in the peritoneal cavity |
| Fever, lethargy, malodorous discharge postpartum | Metritis or retained fetal membranes | Ultrasonographic uterine assessment, hematology and biochemistry |

## Evidence Limitations and Referral Considerations

The evidence base for feline dystocia management is thinner than for canine obstetrics. Much of the published literature consists of questionnaire-based studies of breeding populations and clinical reviews instead of controlled trials. Breed-specific reproductive data from Italian and Swedish catteries provide useful benchmarks for litter size, stillbirth rates, and cesarean section frequency, but these figures may not generalize across regions or management systems. Expert opinion still differs on the optimal timing of surgical intervention in queens with partial obstruction and viable fetuses, and on the role of tocolytic agents in managing uterine inertia.

Referral to a theriogenologist or a specialist in feline reproduction is warranted when medical management has failed, when imaging findings are ambiguous, or when the queen has a history of previous dystocia or cesarean section. Specialist consultation is also appropriate for breeding catteries with recurrent reproductive problems, where a broader investigation of management, nutrition, and infectious disease may be indicated. Laboratory involvement is required when metabolic disease, such as hypocalcemia or hypoglycemia, is suspected, and for histopathology of any placenta submitted after a complicated delivery. Regulatory reporting is not typically required for feline dystocia, but clinicians should be aware of their obligations under local animal welfare legislation if neglect or non-treatment is suspected. Professional resources from bodies such as the Society for Theriogenology and the AVMA can guide practice standards and welfare considerations.

## Frequently Asked Questions

### How Should I Manage Dystocia When Referral or Advanced Imaging Is Unavailable?

When radiography or ultrasonography is unavailable, base the decision to intervene on serial physical examination, vaginal assessment, and progression of labor. Palpate the caudal abdomen to estimate litter size and identify fetal orientation. Digital vaginal examination can confirm a fetal part or placenta at the pelvic inlet. If the queen has been in stage two labor for more than two to four hours without delivery, or if she is straining unproductively for more than 30 minutes, proceed with medical management or surgery as indicated. The necessity of surgery is primarily based on the condition of the dam, progression of labor, and fetal heart rate, as described in [surgical management guidance for canine and feline dystocia](https://pubmed.ncbi.nlm.nih.gov/18495232/). When fetal monitoring is impossible, prioritize maternal safety and intervene earlier.

### What Are the Resource and Cost Considerations When Recommending Cesarean Section?

Cost is a legitimate factor in clinical decision-making, but it should not delay intervention once dystocia is confirmed. Discuss estimated costs for surgery, anesthesia, hospitalization, and neonatal resuscitation with the owner before initiating treatment. Emergency after-hours surgery carries higher fees in most practices. If the owner declines surgery, offer medical management with calcium and oxytocin under close supervision, and document the discussion thoroughly. Breeders should be counseled that cesarean section rates vary by breed and that surgical delivery does not necessarily preclude future breeding, though recurrent dystocia is possible. Refer to [Society for Theriogenology resources](https://www.therio.org/) for client education materials on reproductive emergencies.

### How Does Feline Dystocia Management Differ From Canine Management?

Queens differ from bitches in several clinically relevant ways. Feline gestation averages 64 to 67 days, and litter size is smaller, with a mean of 3.7 to 4.2 kittens depending on breed and population, as reported in [questionnaire-based studies of breeding cats](https://pubmed.ncbi.nlm.nih.gov/30724695/). Queens are more likely to develop uterine inertia secondary to obesity, stress, or overcrowded catteries. They are also more sensitive to oxytocin, so dosing intervals must be longer and the total dose lower than in bitches. Feline neonates are smaller and more fragile, requiring gentler resuscitation. Postoperative care after cesarean section must account for the queen's strong maternal instincts, which can complicate wound care if she licks the incision excessively.

### What Records Should I Keep for a Dystocia Case?

Maintain a complete record that includes signalment, breeding dates, observed mating behavior, pregnancy diagnosis method, and expected parturition date. Document the onset of stage one and stage two labor, frequency and strength of contractions, and any vaginal discharge. Record all physical examination findings, fetal heart rates if measured, imaging results, and the rationale for choosing medical versus surgical management. For medical management, note the timing, dose, and response to each drug administered. For surgical cases, record the anesthetic protocol, uterine incision location, number of kittens delivered, and neonatal viability scores. These records support future breeding decisions and are valuable if complications arise later. Breed-specific reproductive data from [Italian cattery questionnaire research](https://pubmed.ncbi.nlm.nih.gov/30724695/) can help contextualize individual patient findings.

### How Do I Explain the Need for Surgery to a Breeder Who Wants Natural Delivery?

Frame the discussion around fetal and maternal survival instead of breeding philosophy. Explain that prolonged obstructed labor causes fetal distress and uterine fatigue, and that timely surgical intervention improves outcomes. Use specific findings from your examination, such as fetal heart rate decline or lack of progression, to justify the recommendation. Acknowledge that some breeds have higher cesarean rates and that this is not a failure of the queen or the breeder's management. Reference the [MSD Veterinary Manual](https://www.msdvetmanual.com/) for breed-specific whelping and queening norms if the breeder requests additional reading. Offer to discuss future breeding plans after the queen has recovered fully.

### What Should I Do When Medical Management Fails Partway Through?

If the queen delivers one or two kittens and then stops straining, reassess before repeating any drug. Palpate the abdomen to estimate remaining fetal numbers and check vaginal patency. If the cervix is closed and no fetal parts are palpable, consider uterine inertia and repeat calcium and oxytocin according to current formulary guidelines. If the queen is exhausted, febrile, or showing signs of systemic illness, proceed to cesarean section without further medical attempts. Fetal heart rate monitoring, when available, should guide the decision. The [pharmacologic review of reproductive agents](https://pubmed.ncbi.nlm.nih.gov/19501345/) notes that alternative drug treatments with fewer side effects have expanded therapeutic options, but surgical intervention remains the definitive treatment when medical management is inadvisable or has failed.

## Related Clinical & Scientific Guides

* [Diagnostic Approach to Canine Infertility in the Bitch](/knowledge/veterinary-medicine/theriogenology/diagnostic-approach-to-canine-infertility-in-the-bitch)
* [Canine Neonatal Resuscitation: Protocol and Monitoring](/knowledge/veterinary-medicine/theriogenology/canine-neonatal-resuscitation-protocol-monitoring)
* [Equine Breeding Soundness Examination of the Stallion](/knowledge/veterinary-medicine/theriogenology/equine-breeding-soundness-examination-of-the-stallion)


## References and Further Reading

- [Pharmacologic advances in canine and feline reproduction.](https://pubmed.ncbi.nlm.nih.gov/19501345/). 2009.
- [An overview of calf diarrhea - infectious etiology, diagnosis, and intervention.](https://pubmed.ncbi.nlm.nih.gov/24378583/). 2014.
- [The Swedish breeding cat: population description, infectious diseases and reproductive performance evaluated by a questionnaire.](https://pubmed.ncbi.nlm.nih.gov/19254857/). 2009.
- [Canine and feline pregnancy loss due to viral and non-infectious causes: a review.](https://pubmed.ncbi.nlm.nih.gov/18547635/). 2008.
- [Fertility parameters and reproductive management of Norwegian Forest Cats, Maine Coon, Persian and Bengal cats raised in Italy: a questionnaire-based study.](https://pubmed.ncbi.nlm.nih.gov/30724695/). 2019.
- [Surgical management of canine and feline dystocia.](https://pubmed.ncbi.nlm.nih.gov/18495232/). 2008.
- [Society for Theriogenology Resources](https://www.therio.org/). Society for Theriogenology.
- [MSD Veterinary Manual, Professional Edition](https://www.msdvetmanual.com/). MSD Veterinary Manual.
- [American Veterinary Medical Association Practice Resources](https://www.avma.org/resources-tools). American Veterinary Medical Association.

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- [Dystocia in Cattle: Causes, Diagnosis, and Management](/knowledge/veterinary-medicine/theriogenology/dystocia-in-cattle-causes-diagnosis-and-management)
- [Caprine Brucellosis: Diagnosis and Management](/knowledge/veterinary-medicine/theriogenology/caprine-brucellosis-diagnosis-and-management)
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- [Ovine Brucellosis: Diagnosis and Management](/knowledge/veterinary-medicine/theriogenology/ovine-brucellosis-diagnosis-and-management)

> This article is educational professional reference material for veterinary audiences. It is not a substitute for veterinary diagnosis, individual clinical judgment, current product labeling, or applicable regulatory requirements.