In purely practical terms, the male of the human species seems to contribute little to reproduction. His only donation is the male sex cell or gamete, the sperm. This is a tiny cell compared to the female's egg. The female carries the foetus for nine months in her womb, and in most societies she continues ...
It has been proposed that several components or strands make up normal adult sexuality. The first might be called physiological – the need to satisfy the sexual urge at periodic intervals. According to surveys such as that of the American zoologist and sexologist A.C. Kinsey (1894-1956) this urge is present in both sexes, but for ...
Sex and sexual function are, therefore, the outcome of a finely balanced hormonal control system. Imbalances in the levels of hormones, often caused by chromosomal anomalies, can result in a number of bizarre syndromes. Turner's syndrome (XO), where there is an absent X-chromosome, results in a sexually immature female; whereas the presence of an extra ...