@conference {40285,
	title = {The timing of oestrus, LH surge and ovulation in ewes following synchronisation with MAP sponges FGA sponges or CIDR{\textquoteright}s},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {51},
	year = {1991},
	month = {Jan},
	pages = {73-78},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {As part of a programme to increase the number of homozygous  (FecB FecB) replacements available in the Booroola Merino flock at the  Tara Hills Research Station a MOET technique was utilised. Because ewes  of BB genotype are difficult to superovulate, with predictable results,  using conventional treatment regimes, a simplified programme aimed at  enhancing the natural ovulation rate was used. Thirty eight ewes were  treated for 10-11 days with intravaginal sponges. The ewes were then  injected with 500 iu of PMSG on day 15 after sponge withdrawal and  joined with entire rams for 5 days. Sixty six percent of ewes were  marked by the ram and the mean ovulation rate of these was 8.3 (range 5-  18).  Embryo recovery rate was 93.4\% following retrograde flushing of  the fallopian tubes. Fertilisation rate was 68\% and 5.3 embryos were  transferred per donor operated (range 0.-11). The ewes were remated and  lambed naturally. By using a combination of MOET and remating, 24 donor  ewes produced a mean of 3.3 lambs weaned compared to 1.4 lambs weaned by  their naturally mated flock mates.  },
	issn = {1176-5283},
	author = {Shackell GH}
}
