Chung C S, Smith R G, Steinhoff P G, Mi M P
Am J Public Health. 1982 Jun;72(6):548-54. doi: 10.2105/ajph.72.6.548.
The effect of induced abortion on spontaneous pregnancy loss in subsequent pregnancies was studied based on 3,416 pairs of matched data in a follow-up investigation. Pregnancy outcome was examined also in relation to abortion procedure, gestation length at time of abortion, and number of previous abortions. In general there was no significant association between prior induced abortion and risks of pregnancy loss with the relative risks of 1.10, 0.88, and 0.81 for the first to third trimester respectively. A slight increase of first-trimester spontaneous loss was noted with the D&C/Suction procedure and early induced abortion (less than 9 weeks). The D&C procedure was associated with non-significant increase of second-trimester loss with the relative risk of 1.59.
在一项随访调查中，基于3416对匹配数据研究了人工流产对后续妊娠自然流产的影响。还根据流产手术、流产时的妊娠时长以及既往流产次数对妊娠结局进行了检查。总体而言，既往人工流产与流产风险之间无显著关联，孕早期至孕晚期的相对风险分别为1.10、0.88和0.81。采用刮宫/吸宫术及早期人工流产（小于9周）时，孕早期自然流产略有增加。刮宫术与孕中期流产非显著增加相关，相对风险为1.59。
