title: Fetal origin of x-cells in human placental septa and basal plate.
mesh_terms: D001491:Basophils; D005260:Female; D005865:Gestational Age; D006801:Humans; D008297:Male; D008722:Methods; D008854:Microscopy, Electron; D008856:Microscopy, Fluorescence; D008858:Microscopy, Phase-Contrast; D010920:Placenta / Q000166:cytology*; D011247:Pregnancy; D012728:Sex Chromatin; D012737:Sex Factors