[Ovulation in gilts following biotechnical puberty induction and followed by ovulation stimulation]

Eighty gilts were slaughtered following different time intervals from biotechnical puberty induction, using 500 IU or PMS and 250 IU of HCG, and stimulation of ovulation, using 500 IU of HCG, 72 hours after puberty had been induced. The majority of those animals was found to have ovulated between 96 and 120 hours from puberty induction. Only 3.2 per cent of the follicles formed had undergone ovulation after 96 hours but as much as 94,0 per cent after 120. Not only had sexual maturity been reached by all animals, following the above treatment, but genuine superovulation was recordable from the first oestrus, with the average of formed follicles being 23.9. Stimulation of ovulation following puberty induction, therefore, is considered to be useful in providing favourable conditions for effective time-oriented insemination.