FACTORS AFFECTING LITTER-SIZE IN THE SCOTCH HALF-BRED EWE
- 1 August 1966
- journal article
- research article
- Published by Bioscientifica in Reproduction
- Vol. 12 (1), 167-175
- https://doi.org/10.1530/jrf.0.0120167
Abstract
Seventy-eight ewes were injected with pregnant mare serum (PMS) during the normal breeding season. Injections of 500, 750, 1000, 1250 or 1500 i.u. of PMS were given on the 12th or 13th day of the estrous cycle. The number of lambs born per ewe was significantly increased with increasing levels of PMS. Progesterone injections were given to 63 ewes to synchronize estrus within the flock during the normal breeding season. Injections of 500, 750, 1000, 1250 or 1500 i.u. of PMS were given 1 day after the last progesterone injection. The fertility of mating at the first synchronized estrus was high. There was a marked increase in the number of lambs born per ewe using 1500 i.u. of PMS.This publication has 3 references indexed in Scilit:
- QUANTITATIVE STUDIES OF THE INTERACTION BETWEEN PROGESTERONE AND PREGNANT MARE SERUM ON OVARIAN FUNCTION IN THE EWEReproduction, 1964
- AUGMENTATION OF FERTILITY OF ICELAND EWES WITH PREGNANT-MARE SERUM IN SUCCESSIVE YEARSReproduction, 1962
- The application of the technique of egg transfer to sheep breedingAustralian Journal of Agricultural Research, 1962