Abstract

Feral does were used for a 2 x3 x 2 factorial, with 2 types of insemination (cervical v laparoscopic), 3 pregnant mare serum gonadotrophin (PMSG) levels (no PMSG, 150 i.u. 2 d before controlled internal drug releaser (CIDR) removal and 150 i.u. at CIDR removal) and 2 sperm dose rates (50 v 100 million sperm). The semen, obtained from 9 Cashmere bucks, was frozen in straws containing 100 million sperm. Three operators inseminated 171 does 2 d after CIDR removal. The overall kidding rate from cervical insemination was 24% and from laparoscopic was 50%. There was no effect of PMSG, sperm dose rate, buck or inseminator on the percentage of does kidding.

JC, McEwan, JP Hanrahan, JM Fitzsimons, and P Allen

Proceedings of the New Zealand Society of Animal Production, Volume 48, , 41-48, 1988