Polyspermic fertilization in pigs during the luteal phase of the estrous cycle.

Animals Chorionic Gonadotropin/pharmacology Estrus/physiology Female Fertilization/drug effects Gonadotropins, Equine/pharmacology Injections, Intramuscular Injections, Subcutaneous Insemination, Artificial Male Microscopy, Phase-Contrast Ovulation/drug effects Pregnancy Spermatozoa Swine/physiology

Chorionic Gonadotropin Gonadotropins, Equine