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Vaginal oestrogen may relieve painful intercourse

01 June 2016, 13:32

Many women have been reluctant to use HRT to ease menopause symptoms since 2002, when the federally-funded Women's Health Initiative (WHI) study linked the treatments containing man-made versions of the female hormones oestrogen and progestin to an increased risk of breast cancer, heart attacks and strokes.

For the current study, researchers compared how well locally-applied oestrogens helped relieve vaginal pain and dryness among women who stopped HRT after the WHI results came out, as well as among women who stayed on HRT or resumed treatment after a temporary halt.

Read: Vaginal health during menopause

Women were most likely to use the vaginal oestrogen if they reported pain during sex, and if they had stopped HRT, the study found.

HRT rebuilds vaginal walls

Among the women who abandoned HRT and never went back, the participants using vaginal oestrogen reported significantly higher satisfaction with their sex lives, the study published in Menopause also found.

"We would expect that the women with the most severe symptoms would show the greatest benefit and the group that stopped oestrogen/hormone use after the WHI would be expected to develop symptoms and benefited the most," senior study author Dr Michelle Warren, of Columbia University Medical Centre and the Centre for Menopause, Hormonal Disorders and Women's Health in New York, said by email.

Women go through menopause when they stop menstruating, which typically happens between ages 45 and 55. As the ovaries curb production of the hormones oestrogen and progesterone in the years leading up to menopause and afterwards, women can experience symptoms ranging from irregular periods and vaginal dryness to mood swings and insomnia.

Read: Vaginal dryness and sexual discomfort

Vaginal dryness and painful intercourse are symptoms thought to result from atrophy of vaginal tissues because of falling oestrogen levels. HRT has been shown to improve these symptoms by rebuilding vaginal walls.

Before the WHI study raised concerns about HRT, millions of women took Prempro, a pill combining progestin and oestrogen, or Premarin, an oestrogen-only pill. Pfizer Inc. acquired Wyeth, the maker of Premarin and Prempro, in 2009. Warren has served as a consultant to Pfizer, but she said the study was designed and conducted without input from the company.

Study limited by small size

For the study, Warren and colleagues studied vaginal oestrogen use and sexual health in 310 women in New York City who were born between 1938 and 1953 and had used HRT for at least five years.

While about 36 percent of women who stopped HRT used vaginal oestrogen, so did around 17 percent of women who continued HRT, the study found.

Overall, roughly a quarter of women in the study used vaginal oestrogen.

Read: 10 quick facts about vaginal dryness

The researchers acknowledge that the study is limited by its small size and the fact that participants were generally healthy, highly educated women with normal weight, so the results may not generalise to other groups.

Even so, the findings suggest that some women may benefit from vaginal oestrogen whether or not they use HRT, the authors conclude.

"Vaginal oestrogen is safer because very little if any estradiol gets into the blood stream," Dr Michael Thomas, a researcher in reproductive endocrinology and infertility at the University of Cincinnati Medical Centre, said by email.

Lubricants may help make sex less painful for women after menopause, but this alternative can't work like oestrogen to improve the mucous lining of the vagina and make bleeding and abrasions or tearing less likely during intercourse, added Thomas, who wasn't involved in the study.

Read more:

Dry, tight and warm - the dangerous practice of dry sex

What defines a healthy vagina?

Are those skinnies irritating your vagina?

Image: Vaginal discomfort from iStock

- Reuters

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