Incidence and Risk Factors of Perianal Pathology during Pregnancy and Postpartum Period: A Prospective Cohort Study

We aimed to identify the incidence and risk factors of perianal pathology during pregnancy and the postpartum period.

A prospective cohort study was conducted in three institutions in Lithuania. A total of 190 patients were examined and interviewed three times (<12, 18-20 weeks of gestation, and during the first 2 months after delivery). They completed a questionnaire including demographic, obstetric, coloproctological, and birth data.

A total of 73 (34.59%) women developed hemorrhoidal disease after delivery, and 120 (56.87%) developed perianal pathology. Multivariate analysis identified a neonatal birth weight ≥3380 g (OR 4.22; 95% CI 1.83-9.71, p < 0.001) and consumption of eggs (OR 3.10; 95% CI 1.13-8.53, p = 0.028) or cereals (OR 2.87; 95% CI 1.32-6.25, p = 0.008) several times per week as significant risk factors for hemorrhoidal disease. Neonatal birth weight ≥3380 g (OR 3.95; 95% CI 1.47-10.59, p = 0.006), maternal BMI ≥ 21.48 (OR 3.58; 95% CI 1.51-8.47, p = 0.004), the duration of the second labor period ≥38 min (OR 2.81; 95% CI 1.09-7.23, p = 0.032), and consumption of flour products several times per week (OR 2.77; 95% CI 1.10-6.98, p = 0.030) were associated with a higher risk of perianal pathology. Daily consumption of fruits and vegetables (OR 0.35; 95% CI 0.15-0.81, p = 0.014) and less frequent consumption of eggs were protective factors (OR 0.18; 95% CI 0.06-0.56, p = 0.003).

Perianal diseases, especially hemorrhoidal disease, are common during pregnancy and the postpartum period. A neonatal birth weight ≥ 3380 g, a maternal BMI of ≥21.48, duration of the second labor period of ≥38 min, and consumption of flour products and cereals several times a week are risk factors for developing these diseases.