title: Changes in DNA content and urea permeability of the sheep placenta.
mesh_terms: D000818:Animals; D001835:Body Weight; D004247:DNA / Q000378:metabolism*; D004058:Diffusion; D005314:Embryonic and Fetal Development; D005260:Female; D005865:Gestational Age; D008431:Maternal-Fetal Exchange; D009929:Organ Size; D010920:Placenta / Q000378:metabolism*; D011247:Pregnancy; D012756:Sheep / Q000378:metabolism*; D014508:Urea / Q000378:metabolism*
chemical_list: D014508:Urea; D004247:DNA