The insemination in queens can be performed during natural or induced heat with a subsequent induction of the ovulation by using
on the second or third day of the estrus. AI during natural heat is preferable because the gonadotropin used for the induction of heat may cause an inappropriate maternal response
The ovulation in cats generally oc- curs 24-48 hours after coitus (Shille et al., 1983). After the determination of the optimal moment by means of behavioral changes and/or vaginal cytology