Fere was strongly of opinion that sexual relations during pregnancy, especially when recklessly carried out, play an important part in the causation of nervous troubles in children who are of sound heredity and otherwise free from all morbid infection during gestation and development; he recorded in detail a case which he considered conclusive ("L'Influence de l'Incontinence Sexuelle pendant la Gestation sur la Descendance," _Archives de Neurologie_, April, 1905).

Bouchacourt discusses the subject fully (_La Grossesse_, pp.

177-214), and thinks that sexual intercourse during pregnancy should be avoided as much as possible.

Fuerbringer (Senator and Kaminer, _Health and Disease in Relation to Marriage_, vol.i, p.

226) recommends abstinence from the sixth or seventh month, and throughout the whole of pregnancy where there is any tendency to miscarriage, while in all cases much care and gentleness should be exercised.
The whole subject has been investigated in a Paris Thesis by H.
Brenot (_De L'Influence de la Copulation pendant la Grossesse_, 1903); he concludes that sexual relations are dangerous throughout pregnancy, frequently provoking premature confinement or abortion, and that they are more dangerous in primiparae than in multiparae.
Nearly everything that has been said of the hygiene of pregnancy, and the need for rest, applies also to the period immediately following the birth of the child.