Ratten G J, Beischer N A
Med J Aust. 1979 Jun 2;1(11):479-80.
Therapeutic termination of pregnancy performed during the first trimester was associated with a statistically significant increase in the incidence of second trimester abortion and of premature labour in the next pregnancy. In a series of 520 patients who had previously been aborted 8.1% suffered a mid-trimester abortion in their next pregnancy and 8.6% had premature onset of labour (compared to 2.4% (P less than 0.001) and 4.4% (P less than 0.01) respectively in a control series). The incidence of incompetence of the cervix after termination of pregnancy was 4.4%.
孕早期进行的治疗性堕胎与下一孕期中期流产和早产的发生率在统计学上显著增加相关。在一系列520例曾有过堕胎经历的患者中，8.1%在下次怀孕时发生了孕中期流产，8.6%出现了早产（相比之下，对照组系列中这两个比例分别为2.4%（P<0.001）和4.4%（P<0.01））。堕胎后宫颈机能不全的发生率为4.4%。
