Döring G K, Fresenius K J
Geburtshilfe Frauenheilkd. 1979 May;39(5):369-71.
In a total of 11,026 prenatal case patients there were 1000 patients who became pregnant following the cessation of the use of oral contraceptives. Results were compared with the pregnancies of 500 patients who never had employed contraceptive steroids. Comparison shows that in both groups the incidence of premature birth, perinatal mortality, congenital anomalies and twins were similar.
在总共11026例产前病例患者中,有1000例患者在停止使用口服避孕药后怀孕。将结果与500例从未使用过避孕类固醇的患者的妊娠情况进行了比较。比较表明,两组中早产、围产期死亡率、先天性异常和双胞胎的发生率相似。