Which method of induction involves separating the membranes from the lower uterine segment to release prostaglandins?

• A. Stripping the membranes
• B. Balloon dilators
• C. Intercourse
• D. Artificial rupture of membranes

Answer: (A)

Membrane stripping involves the clinician inserting a finger through the cervix and gently separating the membranes from the lower uterine segment. This mechanical separation stimulates the local release of prostaglandins from the decidua and fetal membranes, which promotes cervical ripening and can begin labor contractions. It’s a relatively gentle, often outpatient option to induce or augment labor because it relies on the body’s own prostaglandin release.

Balloon dilators work mainly by applying pressure to dilate the cervix rather than triggering prostaglandin release from the membranes. Intercourse can contribute prostaglandins from seminal fluid but does not separate the membranes. Artificial rupture of membranes releases amniotic fluid and can help labor proceed, but it doesn’t accomplish membrane separation to stimulate prostaglandin release in the same targeted way.