The enigma of the maternal spiral artery and its relation to the fetal cotyledon.
D000818:Animals; D001158:Arteries; D001775:Blood Circulation; D005260:Female; D005333:Fetus; D000882:Haplorhini; D006801:Humans; D008251:Macaca; D010920:Placenta / Q000098:blood supply*; D011247:Pregnancy