Context: Measures of contraceptive use at one point in time do not account for its changing
nature. A measure that addresses the pattern of method use over time may better predict the …

CONTEXT: Unintended pregnancies occur far too often in the United States, and half occur
when couples fail to practice contraception. Improved measures of the continuity of women's …

BACKGROUND: This study was conducted to assess risk factors for contraceptive nonuse
among a nationally representative sample of US women and explored the influence of future …

CONTEXT: Each year, nearly one in four US women at risk of unintended pregnancy
experience one or more months of contraceptive nonuse. Understanding what factors are …

STUDY QUESTION What is the predictive value of pregnancy intentions on contraceptive
behaviours among women aged 18–19? SUMMARY ANSWER Women aged 18–19 have …

CONTEXT: Because rates of unintended pregnancy, abortion and unintended birth are very
high among adult women in the United States, it is important to identify interventions that can …

Context: An understanding of determinants of inconsistent pill-taking could be useful to
service providers who are trying to help women prevent unwanted pregnancy. This article …

An attempt to find a reliable way to measure contraceptive continuation among teenagers
was made in a study of 445 adolescents under age 18 who made an initial visit to one of …

Context: While differences in levels of contraceptive use across socioeconomic subgroups of
women have narrowed greatly over time, large disparities remain in rates of unintended …

Context: Trends in contraceptive use have implications for shifts in pregnancy rates and
birthrates and can inform clinical practice of changes in needs for contraceptive methods …