Bajos Nathalie, Le Guen Mireille, Bohet Aline, Panjo Henri, Moreau Caroline
Gender, Sexual and Reproductive Health, CESP Centre for research in Epidemiology and Population Health, U1018, Inserm, F-94807, Le Kremlin-Bicêtre, France; Institut National d'Etudes Démographiques, F-75020, Paris, France; Université Paris Sud, F-94807, Kremlin Bicêtre, France.
Gender, Sexual and Reproductive Health, CESP Centre for research in Epidemiology and Population Health, U1018, Inserm, F-94807, Le Kremlin-Bicêtre, France.
PLoS One. 2014 Mar 26;9(3):e91539. doi: 10.1371/journal.pone.0091539. eCollection 2014.
The relation between levels of contraceptive use and the incidence of induced abortion remains a topic of heated debate. Many of the contradictions are likely due to the fact that abortion is the end point of a process that starts with sexual activity, contraceptive use (or non-use), followed by unwanted pregnancy, a decision to terminate, and access to abortion. Trends in abortion rates reflect changes in each step of this process, and opposing trends may cancel each other out. This paper aims to investigate the roles played by the dissemination of contraception and the evolving norms of motherhood on changes in abortion rates.
Drawing data from six national probability surveys that explored contraception and pregnancy wantedness in France from 1978 through 2010, we used multivariate linear regression to explore the associations between trends in contraceptive rates and trends in (i) abortion rates, (ii) unwanted pregnancy rates, (iii) and unwanted birth rates, and to determine which of these 3 associations was strongest.
The association between contraceptive rates and abortion rates over time was weaker than that between contraception rates and unwanted pregnancy rates (p = 0.003). Similarly, the association between contraceptive rates and unwanted birth rates over time was weaker than that between contraceptive rates and unwanted pregnancy rates (p = 0.000).
避孕措施的使用水平与人工流产发生率之间的关系仍是一个激烈争论的话题。许多矛盾可能是由于人工流产是一个始于性活动、避孕措施使用（或未使用）、意外怀孕、终止妊娠的决定以及获得人工流产机会的过程的终点。人工流产率的趋势反映了这一过程中每个步骤的变化，相互矛盾的趋势可能会相互抵消。本文旨在研究避孕措施的普及和不断演变的母亲身份规范对人工流产率变化所起的作用。
我们从六项全国概率调查中提取数据，这些调查探讨了1978年至2010年法国的避孕措施和生育意愿，我们使用多元线性回归来探究避孕率趋势与（i）人工流产率、（ii）意外怀孕率、（iii）意外出生率趋势之间的关联，并确定这三种关联中哪一种最强。
随着时间推移，避孕率与人工流产率之间的关联弱于避孕率与意外怀孕率之间的关联（p = 0.003）。同样，随着时间推移，避孕率与意外出生率之间的关联弱于避孕率与意外怀孕率之间的关联（p = 0.000）。
