Hormonal induction of oestrus and pregnancy in anoestrous ferrets (Mustela putorius furo)

Three doses of FSH were tested for their ability to induce oestrus in ferrets. A dose of 0.25 mg, administered twice daily, induced oestrus and breeding in most females within 6-13 days. Addition of 5 i.u. hCG during the final stages of follicular development enhanced the percentage of females with implantation sites (85%), and 23% of the ferrets so treated gave birth to kits, none of which survived for more than 3 days. This may have been due to insufficient prolactin secretion and thus inadequate luteal maintenance and milk production, as these females were maintained on a short-day photoperiod.