title: [Endogenous opioid peptides: source, occurrence and significance in reproduction].
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000378:metabolism*; D004971:Estrus / Q000378:metabolism*; D005260:Female; D007743:Labor, Obstetric / Q000378:metabolism*; D009294:Narcotics / Q000378:metabolism*; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000378:metabolism*
chemical_list: D009294:Narcotics
vernacular_title: Endogene opioide peptide: Herkunft, Vorkommen und Bedeutung im Rahmen der Reproduktion.