OBJECTIVE To present new data on sexual initiation, contraceptive use, and pregnancy among US adolescents aged 10 to 19, and to compare the youngest adolescents' behaviors with those of older adolescents. METHODS Using nationally representative data from several rounds of the National Survey of Family Growth, we performed event history (ie, survival) analyses to examine timing of sexual initi...

BACKGROUND The purpose of this study was to compare the fetal/infant mortality risk associated with each additional week of expectant management to that associated with immediate delivery in women with multiple gestations. METHODS This was a retrospective national cohort study of 94,170 multiple deliveries, 92,619 (98.4%) twin and 1,352 (1.44%) triplet pregnancies, between 32 0/7 and 42 6/7 w...

BACKGROUND In Tanzania, teenage pregnancy rates are still high despite the efforts being made to reduce them. Not enough is known about how adolescents experience and cope with sexuality and teenage pregnancy. Over the past few decades, most studies have focused on vulnerability and risk among youth. The concept of 'reproductive resilience' is a new way of looking at teenage pregnancy. It shift...

Cholesterol was extracted from amniotic fluid, saponified, converted to its trimethylsilyl derivative, and gas chromatographed, with cholesteryl acetate as the internal standard. The method is sufficiently accurate and precise for use with the range of concentrations of cholesterol found in amniotic fluid (5 to 48 mg/litre). Total cholesterol was measured in amniotic fluids collected at differe...

One of the signature public health achievements in the United States in recent years has been the decline in both the teen pregnancy and the teen birth rates. Between 1990 and 2004, the teen pregnancy rate declined 38% [1]; in a similar trend, the teen birth rate declined 31% between 1991 and 2006 [2]. This change was remarkably widespread; significant declines were documented in all states and...

BACKGROUND Pregnancy rate among Iranian adolescents below 20 years of age is increasing. Pregnancy during adolescence is considered a social issue associated with medical, emotional, and social outcomes for the mother, child, and family. The current research examines the experience of pregnancy among Iranian adolescents. MATERIALS AND METHODS The qualitative content analysis method was used. ...

Two university centers in Debrecen, Hungary and Seoul, Republic of Korea collaborated in a prospective study of fertility following induced abortion. Conception rates were compared for 30 months among two groups of women whose last pregnancy outcome was either an induced abortion or a live birth. The cumulative life-table pregnancy rates at each six-month interval for the 30 months of the study...

PURPOSE To evaluate the effect of behavioral, empowerment-focused interventions on the incidence of pregnancy-related school dropout among girls in Nairobi's informal settlements. METHOD Retrospective data on pregnancy-related school dropout from two cohorts were analyzed using a matched-pairs quasi-experimental design. The primary outcome was the change in the number of school dropouts due t...

BACKGROUND While the rate of unintended pregnancy has declined in the United States in recent years, unintended pregnancy among teens in the United States is the highest among industrialized nations, and disproportionately affects minority teens. OBJECTIVE Our objective of this secondary analysis was to estimate the risk of unintended pregnancy for both Black and White teens age 15-19 years w...