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Incontinence & Overactive Bladder Health Center

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Urine Leakage Not Due to Childbirth

Study of Sisters: Blame Genes, Not Kids, for Later-Life Urinary Incontinence
WebMD Health News
Reviewed by Louise Chang, MD

Dec. 2, 2005 - Doctors think it's true. Patients think it's true. And urogynecologist Gunhilde M. Buchsbaum, MD, thought vaginal childbirth put women at risk of urinary incontinence.

Not any more. Buchsbaum, an associate professor at the University of Rochester, N.Y., now thinks childbirth has nothing to do with whether a woman suffers urinary incontinence after menopause.

And she has a good reason to think so. Buchsbaum's team studied pairs of postmenopausal sisters. In each pair, one sister had at least one child by vaginal delivery. The other never had a child. No matter how the researchers looked at it, the results came out the same.

"In a group of sisters where half were childless and half had children, we found no difference in urinary incontinence," Buchsbaum tells WebMD. "There was no difference in type of incontinence, overall prevalence of incontinence, or severity of incontinence."

The findings appear in the December issue of Obstetrics & Gynecology.

Sisters and Urinary Incontinence

It's very common for doctors to think that vaginal delivery puts a woman at risk of urinary incontinence. In fact, a recent survey found that 62% of urogynecologists would support a woman's decision to choose to have a C-section to prevent it.

Yet studies on childbirth and urinary incontinence are divided. Some show a risk, others fail to find one.

Buchsbaum's interest in the issue came when she was contacted by a nearby convent.

"The mother superior said, 'I think we have a problem,'" she recalls.

As they reached the age of menopause, many of the nuns were suffering urinary incontinence. Yet medical examination revealed the obvious: None of the women had ever had a child.

Preliminary studies led Buchsbaum to suspect that childbirth is not a woman's major lifetime risk factor for urinary incontinence. So she and her colleagues designed the current study.

Sisters' Sisters and Urinary Incontinence

At first, the researchers looked at the convent sisters and the sisters' married sisters. The study was later expanded to include other postmenopausal sister pairs where one had had a child by vaginal delivery and the other never gave birth.

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