Wallick collected a number of cases of pneumonia occurring during pregnancy, showing a fetal mortality of 80 per cent.
Felkin relates two instances of fetal malaria in which the infection was probably transmitted by the male parent.

In one case the father near term suffered severely from malaria; the mother had never had a chill.

The violent fetal movements induced labor, and the spleen was so large as to retard it.

After birth the child had seven malarial paroxysms but recovered, the splenic tumor disappearing.
The modes of infection of the fetus by syphilis, and the infection of the mother, have been well discussed, and need no mention here.
There has been much discussion on the effects on the fetus in utero of medicine administered to the pregnant mother, and the opinions as to the reliability of this medication are so varied that we are in doubt as to a satisfactory conclusion.

The effects of drugs administered and eliminated by the mammary glands and transmitted to the child at the breast are well known, and have been witnessed by nearly every physician, and, as in cases of strong metallic purges, etc., need no other than the actual test.