Young women's joint relationship, sex, and contraceptive trajectories: Evidence from the United States

Contraceptive Behavior Dynamics and Unintended Pregnancy: A Latent Transition Analysis

The average U.S. woman wants to have two children; to do so, she will spend about three years pregnant, postpartum, or trying to become pregnant, and three decades trying to avoid pregnancy. However, few studies have examined individual patterns of contraceptive use over time. These trajectories are important to understand given the high rate of unintended pregnancy and how little we know about the complex relationship between contraceptive use, pregnancy intention, and patterns of reproductive behavior. We use data from the 2015-2017 National Survey of Family Growth to examine reproductive behavior and pregnancies across three years of calendar data. We identify seven behavior typologies, their prevalence, how women transition between them, and how pregnancies affect transitions. At any given time, half of women are reliably using contraception. A small proportion belong to a high pregnancy risk profile of transient contraceptive users, but some transition to using condoms or other methods consistently. An unintended pregnancy may initiate a transition into stable contraceptive use for some women, although that is primarily condom use. These findings have important implications for the ways contraception fits into women's lives and how that behavior interacts with relationships, sex, and life stage trajectories.

Adding up risks: Sexual debut and substance use among Italian university students

Adolescence and youth are periods of great changes in an individual's life, during which experiencing first events of the transition to adulthood and, sometimes, violating social norms. Literature has identified an association of risk behaviours with timing of first sexual intercourse, but scant information is available about their relationship with the use of protection or the choice of a casual partner. This study focuses on the relation between initiation of risk behaviours (get drunk and drug use) and initiation of intercourse. Using event history analysis - also in their competing risk form - on data on Italian university students collected in 2000-2001 and in 2017, we intend to verify to what extent the initiation and the timing to risk behaviours is associated with the circumstances of first intercourse (timing, use of protection, type of partner), and if and how initiation to risk behaviours interacts differently with age at sexual debut. Our results show that in a country such as Italy, where family and sexual norms are relatively traditional, young people who got drunk, used marijuana or ecstasy at least one time in their life are more likely to experience risky sexual intercourse.

Limited detraditionalization of intimacy: Growing socioeconomic differences in contraceptive use at first intercourse in Italy

This paper investigates links between social inequality and reproductive behavior. It complements the extensive research on the stratification of young adults' life chances in education and the labor market by considering changes over time in the stratification of contraceptive use at first intercourse by parental background. We seek to understand detraditionalization trends in young people's sexually intimate behavior by investigating whether these trends were driven by particular social groups and how they were supported by policy initiatives. We study Italy from 1950 to 2006, which shows strong regional and socioeconomic disparities, and comparatively slow changes in religiosity and gender norms. Data from the "Survey on Italians' Sexual Behavior" (2006) and macro indicators on family planning centers are used. The findings show a steep increase in contraceptive use at first sexual intercourse over time, stratified by parental background, but only for condom use. We did not find that family planning centers intervened in these relationships.