BACKGROUND The age of initiation of sexual intercourse is an increasingly important issue to study given that sexually active young women are at risk of multiple outcomes including early pregnancies, vesico-vaginal fistula, and sexually transmitted infections. Much research has focused on the demographic, familial, and social factors associated with sexual initiation and reasons adolescents beg...

OBJECTIVE To examine the relation between frequency of sexual intercourse and risk of ischaemic stroke and coronary heart disease. DESIGN Cohort study with 20 year follow up. SETTING The town of Caerphilly, South Wales and five adjacent villages. SUBJECTS 914 men aged 45-59 years at time of recruitment in 1979 to 1983. MAIN OUTCOME MEASURES Ischaemic stroke and coronary heart disease, a...

We examine interactive effects of childhood sexual abuse (CSA) on heritable variation in age at first consensual sexual intercourse in a young cohort of 3,350 female and 2,724 male Australian twins. Consistent with hypotheses, genetic influences explained little if any variation in age at first consensual sexual intercourse for female twins reporting CSA (CSA(+)), with shared environment explai...

BACKGROUND Violence against women has been associated with subsequent risky sexual behaviors and sexually transmitted infections (STIs). We explored whether sexual coercion or violence at first intercourse was associated with self-reported STIs. METHODS Using nationally representative data from the 2006 to 2010 National Survey of Family Growth, we analyzed female respondents aged 18 to 44 (n ...

Aims: To investigate how the Chinese make love. Methods: From Jan. 2009 to Dec. 2009, a survey was carried out of 600 adults (300 male and 300 female adults) in Tianhe community (Guangzhou, China). Information included masturbation, sexual foreplay, oral sex, intercourse, coordination with sexual partner, self-evaluation of one’s sexual function. Results: 255 females and 229 males fulfilled the...

INTRODUCTION We have previously documented the relationships between stress and depression symptoms and adolescent women's nonuse and misuse of condoms and other contraceptive methods and on their unintended pregnancy rates. AIM Here, we examine relationships between mental health symptoms and another understudied adolescent reproductive health behavior-frequency of sexual intercourse. MAIN...