Naeye R L
Br J Obstet Gynaecol. 1981 Jul;88(7):765-70. doi: 10.1111/j.1471-0528.1981.tb01281.x.
The relationship of coitus to antepartum haemorrhage was explored in a longitudinal study of 56 568 pregnancies. The frequency of the haemorrhages was 19/1000 births when women reported no recent coitus compared with 30/1000 when there had been recent coitus (p less than 0.001). The frequency of the bleeding increased with the frequency of coitus. The correlation between coitus and bleeding was independent of other factors known to increase the risk of antepartum bleeding including cigarette smoking, hypertension, advancing maternal age and placenta praevia.
在一项对56568例妊娠的纵向研究中，探讨了性交与产前出血之间的关系。当女性报告近期无性交时，出血频率为每1000例分娩中有19例，而近期有性交时为每1000例中有30例（p<0.001）。出血频率随性交频率增加而升高。性交与出血之间的相关性独立于其他已知会增加产前出血风险的因素，包括吸烟、高血压、产妇年龄增大和前置胎盘。
