title: Investigations into the anti-fertility effect of intra-uterine devices in the ewe.
mesh_terms: D000818:Animals; D001692:Biological Transport; D004971:Estrus; D005260:Female; D005306:Fertilization; D007315:Insemination, Artificial; D007434:Intrauterine Devices / Q000009:adverse effects*; D008297:Male; D010057:Oviducts; D011247:Pregnancy; D011270:Pregnancy, Animal; D012756:Sheep; D013094:Spermatozoa / Q000502:physiology