Emergency vs Planned Cesarean Section in Bitches: Why Timing Matters for Puppy Survival

Cesarean section can be necessary to protect a bitch and her puppies when normal delivery is no longer progressing safely. However, the circumstances surrounding the surgery matter. Emergency cesarean section is associated with substantially greater risk to neonatal survival than a planned procedure, making early identification of high-risk pregnancies and timely decision-making important in canine reproduction. 

When Emergency Cesarean Section Becomes Necessary 

Dystocia may result from maternal or fetal problems. Maternal causes include a narrow birth canal, congenital vaginal abnormalities, uterine inertia or spasms, prolonged pregnancy, uterine torsion or malformations, and abnormal maternal behavior. Fetal causes include oversized puppies, malpresentation, and abnormal litter size¹.

Medical or obstetric management may be attempted in appropriate cases. This can include pharmacological treatment and manual correction of fetal position. Oxytocin is commonly administered, while calcium gluconate and glucose may also be recommended^1,2,3. If these measures fail and viable fetuses are confirmed, emergency cesarean section should be performed promptly².

Fetal Heart Rate Can Influence Urgency 

Fetal heart rate is an important consideration when deciding how urgently surgical intervention is required. A decline below 180 beats per minute is described as an immediate indication for surgical intervention, while a rate below 120 beats per minute represents a very poor prognosis for puppy survival¹.

Prolonged labor can contribute to fetal hypoxia, particularly when placental separation, malpresentation or wedging within the birth canal occurs¹. As delivery is prolonged and surgical intervention is delayed, the likelihood of puppy survival decreases.

Why Planned Cesarean Section May Be Considered 

Planned cesarean section can help reduce puppy loss associated with dystocia in selected high-risk bitches. Indications for elective surgery include breed predisposition, maternal age, and litter size. Bitches with previous delivery complications and those considered to have high breeding value may also warrant consideration for planned cesarean section¹.

This approach can be particularly relevant when previous reproductive history or breed characteristics indicate a high likelihood of perinatal complications. Regular monitoring during pregnancy can help identify bitches for whom planned intervention may be preferable to waiting until an emergency develops.

Emergency and Elective Procedures Have Different Outcomes 

The difference in neonatal outcome between emergency and elective cesarean section is clinically important. Puppies delivered by emergency cesarean section were reported to be more than 7.3 times less likely to survive than puppies delivered by elective cesarean section¹.

Emergency cesarean section can also carry substantial maternal risk, with mortality reported to be as high as 20% for puppies and 1% for bitches, particularly in small and predisposed breeds, including predominantly brachycephalic breeds such as French Bulldogs, Boston Terriers, Chihuahuas, and Pugs¹.

Anesthesia and Newborn Assessment Still Matter 

For planned surgery, the anesthetic protocol should account for both the bitch and the fetuses. Regardless of whether delivery occurs naturally, through emergency surgery or through a planned procedure, newborn viability should be assessed and appropriate treatment instituted when abnormalities are identified^2,4.

Following cesarean section, rapid neonatal assessment using tools such as the modified APGAR score and neonatal viability assessment can help identify puppies requiring additional care.

Key Takeaways 

• Identify bitches with breed, age, litter-size or previous reproductive risk factors before parturition.

• Do not allow unsuccessful medical or obstetric management to unnecessarily delay surgery when viable fetuses remain.

• A fetal heart rate below 180 bpm is an immediate indication for surgical intervention, while below 120 bpm carries a very poor survival prognosis.

• Emergency cesarean section carries substantially greater neonatal risk than elective surgery.

• Planned cesarean section may be considered in appropriately selected high-risk bitches.

• Use an anesthetic protocol appropriate for both the bitch and fetuses.

• Assess every newborn promptly after delivery and provide additional care when viability is compromised.

The key clinical consideration is timing. Identifying a high-risk bitch before labor becomes complicated may allow planned intervention, while recognizing fetal or maternal deterioration during labor can help prevent unnecessary delay when emergency cesarean section becomes indicated. 

References 

1. Uchańska O, Ochota M, Eberhardt M, Niżański W. Dead or alive? A review of perinatal factors that determine canine neonatal viability. Animals. 2022 May 30;12(11):1402. https://www.mdpi.com/2076-2615/12/11/1402 

2. O'Neill DG, O'Sullivan AM, Manson EA, Church DB, McGreevy PD, Boag AK, Brodbelt DC. Canine dystocia in 50 UK first‐opinion emergency care veterinary practices: clinical management and outcomes. Veterinary Record. 2019 Mar;184(13):409-. https://bvajournals.onlinelibrary.wiley.com/doi/pdf/10.1136/vr.104944 

3. Vassalo FG, Simões CR, Sudano MJ, Prestes NC, Lopes MD, Chiacchio SB, Lourenço ML. Topics in the routine assessment of newborn puppy viability. Topics in companion animal medicine. 2015 Mar 1;30(1):16-21. https://www.sciencedirect.com/science/article/pii/S1938973615000197 

4. Antończyk A, Ochota M, Niżański W. Umbilical cord blood gas parameters and Apgar scoring in assessment of new-born dogs delivered by cesarean section. Animals. 2021 Mar 4;11(3):685. https://www.mdpi.com/2076-2615/11/3/685