Previous Pregnancies Among Young Women Having an Abortion in England and Wales.

Purpose: The purpose of this study was to use national statistics on abortions carried out in England and Wales to more precisely estimate the proportion of young women aged <20 years obtaining an abortion who have had one or more previous pregnancies.

Methods: Secondary analysis of abortion data from the Office of National Statistic and the Department of Health by parity for women aged <20 years, ordinarily residing in England and Wales, from 1992 to 2013.

Results: Over the past 20 years, the proportion of teenagers in England and Wales having an abortion as a result of a subsequent pregnancy increased by 33% (from .