[Studies on various dosages of PMS and HCG in biotechnical puberty induction in young sows]

The PMS and HCG doses by which to induce puberty and successfully use the first induced oestrus were tested in three experimental slaughter series on 197 prepuberal young sows. An injection of 500 International Units of PMS and 250 IU of HCG was found to bear greatest promise. While higher dosages gave higher rates of ovulation and, following insemination, higher numbers of embryos, pregnancy rates as a whole dropped severely. Since a very high percentage of all animals involved exhibited follicle stimulation, following such treatment, while only half of them displayed tolerance, it is strongly suggested to use for all animals deadline-oriented rather than toleranceoriented insemination.