[Present status in the study of placenta].
Liu
B
B
D005260:Female; D006801:Humans; D018445:Infectious Disease Transmission, Vertical; D010920:Placenta / Q000473:pathology* / Q000821:virology; D010922:Placenta Diseases / Q000473:pathology / Q000821:virology; D011247:Pregnancy; D014327:Trophoblasts / Q000502:physiology; D014777:Virus Diseases / Q000635:transmission