It is the mother who is the child's supreme parent. At various points in zoölogical evolution it has seemed possible that the functions that we now know as those of maternity would be largely and even equally shared by the male parent. Nature has tried various experiments in this direction, among the fishes, for instance, and even among birds. But reasonable and excellent as these experiments were, and though they were sufficiently sound to secure their perpetuation unto this day, it remains true that it was not along these lines that Man was destined to emerge. Among all the mammal predecessors of Man, the male is an imposing and important figure in the early days of courtship, but after conception has once been secured the mother plays the chief part in the racial life. The male must be content to forage abroad and stand on guard when at home in the ante-chamber of the family. When she has once been impregnated the female animal angrily rejects the caresses she had welcomed so coquettishly before, and even in Man the place of the father at the birth of his child is not a notably dignified or comfortable one. Nature accords the male but a secondary and comparatively humble place in the home, the breeding-place of the race; he may compensate himself if he will, by seeking adventure and renown in the world outside. The mother is the child's supreme parent, and during the period from conception to birth the hygiene of the future man can only be affected by influences which work through her.