Uterine presensitization and embryo survival and growth in Booroola Merino x South Australian Merino ewes.
The fertility enhancing effects of semen were examined following the intra-uterine insemination of killed spermatozoa plus seminal plasma 17 d prior to insemination with viable spermatozoa. Three experiments were conducted: two on 1.5-yr old and 2.5 to 5.5 yr-old Booroola Merino x South Australian Merino ewes in 1986 and one on 1.5 yr-old ewes in 1987. Differences between treatment and control groups for the percentage of ewes exhibiting estrus by Days 21 and 35 following fertile insemination, the percentage of ewes with viable embryos at Day 35, the number and weight of viable embryos per ewe, the nubmer of caruncular implantation sites and the progesterone level were not statistically significant (P>0.05). There were no statistically significant treatment by experiment interactions for any of the variables examined. Inflammation and edema of the endometrial tissue was not observed following the presensitization treatment.
Kleemann
D O
DO
Department of Agriculture, Turretfield Research Centre, Rosedale, S.A. 5350, Australia.
Walker
S K
SK
Walkley
J R
JR
Smith
D H
DH
Grimson
R J
RJ
Stone
B A
BA
Seamark
R F
RF