Fig. 1From: Antibiotic use during pregnancy: how bad is it?The fetoplacental microbiome of healthy pregnancy and its origins. Bacteria and their genes have been isolated from human placentas, amniotic fluid, fetal membranes, and fetal gastrointestinal tract in healthy, normal pregnancies. These bacteria have three main routes of entry: the oro-fetoplacental route, the gastrointestinal-fetoplacental route, and the genitourinary-fetoplacental route. Examples of specific bacteria are indicatedBack to article page