A rising number of women are confronting challenges with fertility following caesarean sections, prompting renewed examination of the procedure’s long-term reproductive effects.

The caesarean section, or C-section, has become the most common method of childbirth delivery in the United Kingdom. According to recent NHS data, nearly 45 percent of births in England during the year ending March 31, 2025, were by C-section, comprising about 20 percent elective and 25 percent emergency procedures. This marks a significant increase from a decade earlier, when just over a quarter of births were by caesarean. Factors contributing to the rise include increasing maternal age and a higher prevalence of conditions such as obesity and gestational diabetes, which can complicate pregnancies and elevate the likelihood of surgical delivery.

While C-sections often provide essential, sometimes lifesaving, alternatives to vaginal delivery, emerging evidence suggests the procedure may have unintended consequences on future fertility. A large-scale study published in March in the American Journal of Obstetrics & Gynecology found that women who underwent a caesarean delivery had an approximately 11 percent lower chance of having another child compared to those who delivered vaginally.

Women experiencing secondary infertility—that is, difficulty conceiving after a previous healthy pregnancy—are increasingly exploring these links. One patient’s experience underscores the issue: after her first child’s birth via planned C-section, chosen due to lack of cervical dilation after extended induction attempts, she encountered years of unsuccessful conception efforts despite multiple rounds of in vitro fertilization (IVF).

Subsequent investigations revealed she developed a “niche” or isthmocele, a defect forming under the cesarean scar on the uterus. This pouch can trap fluid and disrupt normal uterine function, potentially impacting fertility and pregnancy outcomes. Although such defects are often small and symptomless, they may contribute to reproductive challenges for some women.

Despite the growing recognition of such complications, current guidelines from the National Institute for Health and Care Excellence (NICE) do not explicitly address the potential for reduced fertility following cesarean sections. Women are typically advised to wait 18 months before attempting another pregnancy to allow uterine healing, but discussions about possible impacts on future fertility are often absent from pre-surgical counseling.

Medical professionals emphasize that while cesarean delivery is a critical option that enhances safety in many high-risk births, patients should be fully informed about all potential short- and long-term effects. Further research and updated clinical guidelines may help clinicians better counsel women on the risks associated with C-sections, particularly as rates of the procedure continue to rise.