Millar W J, Wadhera S, Henshaw S K
Health Statistics Division, Statistics Canada, Ottawa.
Fam Plann Perspect. 1997 Jan-Feb;29(1):20-4.
In Canada, 20% of women who obtained an abortion between 1975 and 1993 had had at least one previous abortion. An analysis of data on 1.2 million abortions shows that the proportion of abortion patients undergoing repeat procedures increased from 9% to 29% over the 19-year period. The proportion was above average (22-28% for all years combined) among women who were in common-law marriages, those aged 25-39 and those who had previously had children. In 1993, 27 women per 1,000 who had ever had an abortion underwent another one, while 13 women per 1,000 who had never had an abortion obtained their first one; among teenagers, the repeat rate was four times the rate of first abortions (81 per 1,000 vs. 19 per 1,000). During the study period, the repeat rate rose sharply among women younger than 25 but fell among those aged 30 and older. In 1993, fewer than 2% of abortions were obtained by women who had had three or more previous procedures, suggesting that abortion is not widely used as a primary method of birth control.
在加拿大，1975年至1993年间接受堕胎手术的女性中，20%曾至少有过一次堕胎经历。一项对120万例堕胎数据的分析表明，在这19年期间，接受重复堕胎手术的患者比例从9%增至29%。在同居女性、25至39岁的女性以及曾育有子女的女性中，这一比例高于平均水平（所有年份综合起来为22%至28%）。1993年，每1000名曾有过堕胎经历的女性中有27人再次接受堕胎手术，而每1000名从未有过堕胎经历的女性中有13人首次接受堕胎手术；在青少年中，重复堕胎率是首次堕胎率的四倍（每1000人中有81例与19例）。在研究期间，25岁以下女性的重复堕胎率急剧上升，而30岁及以上女性的重复堕胎率则有所下降。1993年，曾有过三次或以上堕胎经历的女性接受堕胎手术的比例不到2%，这表明堕胎并未广泛用作主要的节育方式。
