Andrade A T, de Souza J P, Rowe P J, Shaw S T
Contraception. 1979 Jul;20(1):19-26. doi: 10.1016/0010-7824(79)90041-6.
No effect of pregnancy was found on baseline menstrual blood loss (MBL) in women within one year of parturition or abortion. The increased bleeding response of women to intrauterine devices (IUDs) was found to be independent of pregnancy status during the year preceding IUD sertion. Women pregnant within a year of insertion had no different MBL than those pregnant more than a year prior to insertion. MBL quantified in subjects within three months of discontinuing combined oral contraceptives (OCs) was significantly lower than in prior non-OC users. Furthermore, MBL was significantly reduced in the former group during the first three menses following IUD insertion. At the sixth and twelfth menses post-insertion, MBL was still lower in prior OC users, but the difference between users and non-users was less and no longer statistically significant.
在分娩或流产后一年内的女性中，未发现怀孕对基线月经失血量（MBL）有影响。发现女性对宫内节育器（IUD）的出血反应增加与放置IUD前一年的怀孕状态无关。在放置IUD一年内怀孕的女性与在放置IUD一年多以前怀孕的女性相比，MBL没有差异。在停用复方口服避孕药（OC）三个月内的受试者中，定量的MBL显著低于以前未使用OC的人。此外，在前一组中，放置IUD后的前三个月经周期MBL显著减少。在放置IUD后的第六和第十二个月经周期，以前使用OC的人的MBL仍然较低，但使用者和非使用者之间的差异较小且不再具有统计学意义。
