Pregnancy sickness as an adaptation to concealed ovulation.
Copyright policy Pregnancy sickness as an adaptation to concealed ovulation.
The hypothesis that pregnancy sickness has evolved to expel dietary toxins (PROFET, 1988; 1992; HOOK, 1976) is critically reviewed. Instead it is proposed that pregnancy sickness and mastalgia have evolved to reduce frequency of sexual intercourse in early pregnancy. Reduction in coital frequency during the first trimester has often been documented. Uterine motility during sexual excitement contrasts with lack of spontaneous myometrial activity in the first trimester, except when uterine cramping sometimes occurs as a result of intercourse. Such cramping would be expected to increase the chances of spontaneous abortion.
- University of California, San Diego United States
Ovulation, Vomiting, Libido, Bacterial Toxins, Uterus, Coitus, Pain, Adaptation, Physiological, Abortion, Spontaneous, Breast Diseases, Enterotoxins, Pregnancy Trimester, First, Uterine Contraction, Estrus, Pregnancy, Hyperemesis Gravidarum, Animals, Humans, Female, Orgasm
Ovulation, Vomiting, Libido, Bacterial Toxins, Uterus, Coitus, Pain, Adaptation, Physiological, Abortion, Spontaneous, Breast Diseases, Enterotoxins, Pregnancy Trimester, First, Uterine Contraction, Estrus, Pregnancy, Hyperemesis Gravidarum, Animals, Humans, Female, Orgasm
selected citations These citations are derived from selected sources.This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).0 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average
Citations provided by BIP!Popularity provided by BIP!