Coital Retrograde Menstruation as a Risk Factor for Pelvic Endometriosis

F. Fadhel Samir, Sanaa Badr, A Al Obeidly, Aisha Alfotouh, A W Shaik Farid, N Alsamny, Baioumy Ahmed
In: Qatar Medical Journal · 2011 · vol. 2011(1) · doi:10.5339/qmj.2011.1.9 · W2515521995
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⚙ AI-generated summary by gemini-2.5-flash-lite, 2026-06-07 ⓘ

This study found a statistically significant relationship between coital practice during menstruation and the incidence of endometriosis in women.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-07 · read from full text ⓘ

This study evaluated whether coitus during menstruation is a possible risk factor for endometriosis in 78 patients, assessing their history of sexual activity during menses and examining them with ultrasound (transabdominally, transvaginally, or both) prior to laparoscopy or surgery; MRI was performed in only 6 patients. The authors reported a statistically significant association between endometriosis and coital practice during menstruation, with endometriosis incidence of 66% among those who had coitus during menses versus 34% among those who did not. A stated limitation is that MRI was used in a small subset (6/78), potentially affecting diagnostic assessment consistency. This paper is centrally about endometriosis—specifically testing coitus during menstruation as a potential predisposing factor.

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Abstract

To investigate coitus during menstruation as a possible predisposing factor for endometriosis 78 patients were asked about their coital habitus during menstruation and subsequently were examined by ultrasound transabdominally, transvaginally or both, before laparoscopy or surgery. MR! was used in six patients only. There was a statistically significant relationship between endometriosis and coital practice during menstruation. The incidence of endometriosis in patients with history of coitus in menses was 66% while the incidence was 34 % in patients with no such history. It is concluded that coitus during menses could be a predisposing factor for endometriosis.
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To investigate coitus during menstruation as a possible predisposing factor for endometriosis 78 patients were asked about their coital habitus during menstruation and subsequently were examined by ultrasound transabdominally, transvaginally or both, before laparoscopy or surgery. MR! was used in six patients only. There was a statistically significant relationship between endometriosis and coital practice during menstruation. The incidence of endometriosis in patients with history of coitus in menses was 66% while the incidence was 34 % in patients with no such history. It is concluded that coitus during menses could be a predisposing factor for endometriosis. To investigate coitus during menstruation as a possible predisposing factor for endometriosis 78 patients were asked about their coital habitus during menstruation and subsequently were examined by ultrasound transabdominally, transvaginally or both, before laparoscopy or surgery. MR! was used in six patients only. There was a statistically significant relationship between endometriosis and coital practice during menstruation. The incidence of endometriosis in patients with history of coitus in menses was 66% while the incidence was 34 % in patients with no such history. It is concluded that coitus during menses could be a predisposing factor for endometriosis. To investigate coitus during menstruation as a possible predisposing factor for endometriosis 78 patients were asked about their coital habitus during menstruation and subsequently were examined by ultrasound transabdominally, transvaginally or both, before laparoscopy or surgery. MR! was used in six patients only. There was a statistically significant relationship between endometriosis and coital practice during menstruation. The incidence of endometriosis in patients with history of coitus in menses was 66% while the incidence was 34 % in patients with no such history. It is concluded that coitus during menses could be a predisposing factor for endometriosis.

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endometriosis

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