Induction of Heat, Ovulation and Fertility in Gilts with Delayed Puberty

Publisher Website
Google Scholar
Abstract
One hundred and twenty-six gilts that had not been detected in heat by 9 mo. of age were injected with 500 I.U. of pregnant mare's serum gonadotrophin (PMS). On the fourth and fifth day after PMS, 95 (75%) were in heat. Gilts not showing heat had either infantile genital tracts or had ovulated previously without being detected in heat. Heats recurred at normal intervals in eight treated but unmated gilts. Ninety-four of 117 gilts (80%) examined had ovulated. The mean number of ovulation points per gilt was 13. Fifty-eight of 86 (67%) gilts bred conceived. Seventeen pregnant gilts had a mean of 8.4 fetuses each. The injection of PMS into gilts 9 to 12 mo. of age with normal reproductive tracts and who have not had a previous heat, induces heat, ovulation, recurrent estrous cycles and apparently normal fertility. Copyright © 1969. American Society of Animal Science. Copyright 1969 by American Society of Animal Science

This publication has 0 references indexed in Scilit: