Seasonal changes in sexual hormones secretion, sexual behaviour and sperm production in man

Abstract

In many species, genital activity proceeds according to a seasonal rhythm. Variations concern the secretion of gonadotrophic and steroid hormones, sexual activity and spermiogram parameters. In man, a statistical evaluation of reproductive physiology rhythms is being processed. The first results display seasonal variations of hormonal secretions (testosterone, follicle stimulating hormone, luteinizing hormone), and sexual activity as determined by certain environmental factors (birthrates, sale of contraceptives, rape charges, etc.). The seasonal alterations in human semen composition are less well understood, however, there is a definite increase of necrospermia during winter. All research on the effect of drugs that interfere with spermatogenesis and potency must take any seasonal changes into account.