OBJECTIVE To find out whether taking images of the male and female genitals during coitus is feasible and to find out whether former and current ideas about the anatomy during sexual intercourse and during female sexual arousal are based on assumptions or on facts. DESIGN Observational study. SETTING University hospital in the Netherlands. METHODS Magnetic resonance imaging was used to st...

Five subsamples of cervical cancer patients and matched con trols, totaling 416 subjects in each group, were compared with respect to selected sexual variables. All samples were drawn from the same hospital population as part of a larger multidimensional procedure. Age at first coitus was the variable of greatest discriminatory power, strongly overshadowing all other significant differences, an...

It remains unclear whether the frequency of marital coitus does in fact decline universally across the life course, what shape that decay normally takes, and what best accounts for it: increasing marriage duration, women's age or age of their partners. Using cross-sectional Demographic and Health Survey (DHS) data of 91,744 non-abstaining women in their first marriage, a generalized linear mode...

Case reports of women with the rare condition of human seminal plasma allergy have indicated that the condition may be associated with life-threatening anaphylactic reactions in relation to coitus. Few observations, if any, of long-term outcome of the condition are available. The aim of this paper was to present a case diagnosed in an 18-year-old girl who presented with generalized urticaria, n...

Plasma levels of testosterone (T), luteinizing hormone (LH), and cortisol were measured in 10 adult male rhesus monkeys before and shortly after coitus. Mean levels of T and LH did not increase significantly after coitus or in control (no ejaculation) tests, but cortisol levels did in both cases. In 10 different males, no significant change was found in the plasma levels of T after electroejacu...

Coitus interruptus, also known as the withdrawal method, is the oldest form of male contraceptive method to be practiced. [1] It involves the male partner pulling out the penis before ejaculation. [1] Even though it is the oldest method of male contraception to be practiced, research has given it very little attention. The few studies that have been conducted suggest that it is widely practiced...

Certain brain peptides and catecholamines function in activating the hypothalamohypophysial-ovarian axis in both rabbits and rhesus monkeys. The natural stimulus for a surge release of GnRH is coitus in rabbits, whereas the initial excitatory signal is ovarian steroids in monkeys. Despite this contrast in initial signals, specific neurochemicals may serve as common stimuli for GnRH secretion in...

Italy represents an unexpected and in some ways paradoxical outcome in terms of fertility control: one of the lowest birth rates in the world seems to have been accomplished through the preponderant use of “traditional” methods. Compared to other countries, there has been a reluctance to abandon coitus interruptus. In France in 1994, 84% of women used IUDs or the pill, compared to 42% in Italy ...

This paper discusses the reproductive health knowledge of Nigerian in-school adolescents, with special reference to pregnancy occurrence at first coitus. The data were derived from an Association for Reproductive and Family Health (ARFH) survey carried out in four secondary schools in Ibadan, Nigeria, between August and October 1995. A total of 828 students were interviewed. The results reveale...