title: Letter: Collagen synthesis in long-term amniotic fluid cell cultures.
mesh_terms: D000649:Amniocentesis; D000653:Amniotic Fluid / Q000166:cytology / Q000378:metabolism*; D002478:Cells, Cultured; D003094:Collagen / Q000096:biosynthesis*; D005260:Female; D005347:Fibroblasts; D005865:Gestational Age; D006801:Humans; D006909:Hydroxyproline / Q000096:biosynthesis; D008297:Male; D011247:Pregnancy; D012737:Sex Factors
chemical_list: D003094:Collagen; D006909:Hydroxyproline