A membrane sweep is a procedure sometimes used in late pregnancy to encourage the natural onset of labor. It is considered a less invasive option that may help avoid or delay a medical induction.
Understanding Membrane Sweeps
A membrane sweep, also known as membrane stripping, is a manual procedure performed by a healthcare provider during an internal vaginal examination. The provider inserts a gloved finger through the cervix and gently separates the amniotic sac membranes from the lower part of the uterus. This action releases natural hormones called prostaglandins, which play a role in softening and preparing the cervix for labor.
Why a Sweep May Be Offered
Healthcare providers may offer a membrane sweep to pregnant individuals who are nearing or past their due date, typically after 39 weeks of pregnancy. The main purpose is to encourage labor to start naturally, potentially reducing the need for more formal medical induction methods. It can be suggested if the cervix has begun to dilate but contractions have not yet started or have stopped. This procedure is often considered a first step before considering pharmaceutical or other mechanical induction methods.
The Procedure and Immediate Sensations
During a membrane sweep, you will typically lie on an examination table, similar to a routine pelvic exam, with your feet in stirrups. The healthcare provider will first check if your cervix is sufficiently dilated to allow the procedure. If it is, they will then insert one or two gloved fingers into the cervix and make a circular sweeping motion around the opening. This action aims to detach the membranes from the uterine wall.
The procedure is generally quick, lasting only a few minutes. You may experience discomfort, pressure, or mild cramping during the sweep. Some individuals describe the sensation as similar to a rougher pelvic exam. It is important to communicate any significant pain to your provider during the procedure.
Potential Outcomes and When to Seek Advice
After a membrane sweep, outcomes can vary; some individuals may go into labor within a few days, while for others, the procedure may have no immediate effect. Many people experience common, minor side effects such as light vaginal bleeding or spotting, irregular contractions, or the loss of their mucus plug, also known as a “bloody show.”
If the sweep is successful, labor often begins within 48 hours, though it can take up to seven days. However, it is important to contact your healthcare provider immediately if you experience heavy bleeding that soaks through a pad, continuous leakage of clear fluid (suggesting your water has broken), or severe, unmanageable pain. These symptoms may indicate a complication that requires prompt medical attention. If a membrane sweep does not initiate labor, your healthcare provider will discuss other options for managing your pregnancy’s progression.