Oestrus induction with intravaginal progesterone is the most preferred method in anoestrus sheep. In previous studies it was argued that decrease level before sponge removed reduces efficiency. This study aimed to test hypothesis additional treatment during priming anestrous ewes could increase reproductive efficiency of induction. The conducted on 261 Kangal sheep, which were pregnant autumn a...

A continuous supply of lambs is expected from the market, but not realizable without additional administration of hormones in seasonal breeds kept under extensive conditions. Our study had the aim to work out a possibility to induce fertile cycles in a flock of the Blackhead sheep already in early summer. Analyses of hormones progesterone and LH in untreated ewes were used, together with other ...