Inhibition of ovum fertilization in the ewe by intra-uterine plastic spirals.
D000818:Animals; D004971:Estrus / Q000502:physiology; D005260:Female; D005306:Fertilization; D007247:Infertility, Female; D008297:Male; D010063:Ovum; D010570:Pessaries; D010969:Plastics; D011247:Pregnancy; D012756:Sheep
D010969:Plastics