Some of the most common bodily changes that occur in pregnancy are infrequently discussed. Whilst morning sickness and heartburn dominate pregnancy conversations, bowel dysfunction, which affects up to two-thirds of pregnancies, rarely receives the attention it deserves. Research reveals that these issues are far more prevalent than previously recognised, with significant implications for maternal wellbeing.
During the third trimester, approximately 67% of women experience constipation, 45% experience flatus incontinence, and 3% report faecal incontinence.
Postpartum, these challenges can persist or evolve. Between 7-25% of women experience some form of faecal or flatus incontinence following delivery, yet less than 15% of these seek medical attention, often due to embarrassment or the mistaken belief that these symptoms are an inevitable consequence of motherhood.
The Science Behind the Symptoms
The cause of pregnancy-related bowel dysfunction is multifactorial:
Hormonal Influences: Progesterone, essential for maintaining pregnancy, causes smooth muscle relaxation throughout your gastrointestinal tract. This slows transit time and reduces sphincter tone, contributing to both constipation and diminished continence.
Mechanical Effects: As your uterus expands, it creates conformational changes in your pelvic floor, increases intraabdominal pressure, and can directly compress the colon. These mechanical factors contribute to obstructive symptoms, particularly in later pregnancy.
Delivery-Related Trauma: Vaginal delivery, especially instrumented delivery or deliveries complicated by obstetric anal sphincter injuries (third- or fourth-degree tears), represents a significant risk factor for postpartum incontinence. However, caesarean delivery doesn't provide complete protection, suggesting that pregnancy itself, rather than delivery mode alone, affects pelvic floor function.
Additional Factors: Medication side effects (particularly from iron supplementation and anti-nausea medications), dietary changes, dehydration from nausea, and reduced physical activity all compound these issues.
The Path Forward
Breaking the silence around pregnancy-related bowel dysfunction is essential. These symptoms are common, treatable, and deserve clinical attention. If you're experiencing these issues seek treatment early. With appropriate recognition, evaluation, and treatment, most women can achieve significant improvement in symptoms and quality of life.
