Hormone Therapy to Induce Estrus and Ovulation in Sheep during the Anestrous Season (Terapia Hormonal para Inducir el Estro y la Ovulacion en Ovinos durante la Epoca de Anestro)

摘要

The study was conducted at the Central Sierra of Peru (12 degrees South latitude, 76 deg West longitude, 3,800 m elevation) with 21 Junin and 21 Criollo sheep grazed on native pasture. About half of the ewes of each breed were synchronized to induce estrus and ovulation. The ovaries of all ewes were observed during the estrous cycle. They were bred to observe the incidence and rate of ovulations. Fertilization failure and/or embryo fetal loss in ewes receiving FGA in sponges was higher (78.7%) than those receiving progesterone.