The goal of this study was to examine the effects of early and adverse experiences with sex and alcohol on adolescent drinking the year before and during pregnancy. Pregnant adolescents, recruited at an outpatient prenatal clinic, were interviewed about their substance use. A subsample was asked about their first sexual experiences. Associations among early experiences with alcohol and sex and ...

Sexual behaviour of 75 normal married females was studied. Most of them had a healthy attitude to sex. Frequency of sexual activity decreases with age and duration of marriage. Median frequency for 21-30years age was 2/week, for 31- 40years was 1.4/week and for 41-50 years was 0.5/week. Frequency of coitus did not correlate with socio-economic status. Nearly 52% women had more than 50% satisfac...

There are few experimental investigations of the natural coital process in human subjects; the relatively small literature on this topic deals mainly with extracoital orgasm. Boas & Goldschmidt (1932) made simultaneous recordings of the heart rate of a man and woman in coitus. There was a peak in the heart rate of the woman with each of her four orgasms, and of the man with ejaculation. Mendels...

Heterosexual behaviour is a complex subject and one which is aggravated by confounding variables. Few studies have investigated the way in which one variable, namely coitus, is initiated and negotiated in stable marital relationships. As the HIV/AIDS pandemic spreads in sub-Saharan Africa, the subject of marital coitus becomes of increasing concern. This study tests a methodology of semi-struct...

The objective of the study was to test the hypothesis that gender can be preselected by timing coitus in relation to ovulation, the marker of ovulation being the Peak symptom according to the Billings Method. A blind prospective study of 99 couples wishing to preselect the sex of their child was conducted in Nigeria, using the Post-Peak approach of Billings Method for males and Pre-Peak for fem...

Preimplantation embryo development was studied in the golden hamster (Mesocricetus auratus). Three groups of regularly cycling female hamsters were used: (I) 30 nulliparous young female (NYF) hamsters; (II) 24 nulliparous adult female (NAF) hamsters and (III) 30 multiparous adult female (MAF) hamsters. Female hamsters were mated with male hamsters of proven fertility. Only 15 min were allowed f...

OBJECTIVE To understand gender differences in sexual behaviours in response to genitourinary symptoms. METHODS 473 (239 female and 234 male) subjects were enrolled at an STD clinic regardless of symptoms or infection status. Subjects completed a 30 day calendar recall interview of genitourinary symptoms, coital activity, sexual partners, and condom use. RESULTS Of the total of 473 participa...

A needle-tipped polyvinyl catheter or subminiature pressure transducer was implanted in the corpus cavernosum penis (CCP), corpus spongiosum penis (CSP), or bulbus glandis to determine the pressure during coitus in 42 dogs. Silver ring electrodes were implanted in the ischiocavernosus (IC) and bulbospongiosus (BS) muscles to monitor the electromyographic (EMG) activity of these muscles. The CCP...

DOI: 10.1097/BRS.0000000000000518 Study Design. Repeated measures design. Objective. To describe male spine movement and posture characteristics during coitus and compare these characteristics across 5 common coital positions. Summary of Background Data. Exacerbation of pain during coitus due to coital movements and positions is a prevalent issue reported by low back pain patients. A biomechani...