Zobrazeno 1 - 10
of 74
pro vyhledávání: '"R.W. Rorie"'
Publikováno v:
Theriogenology. 57:137-148
Artificial insemination and embryo transfer programs are dependent on efficient and accurate detection of estrus. Visual observation is accurate at detecting animals in estrus, but efficiency ranges from approximately 50 to 70%. Electronic technologi
Publikováno v:
Theriogenology. 56:357-369
The objective was to determine pregnancy rate and stage of embryonic loss in response to grazing endophyte-free (E-; n = 20) or infected (E+; n = 30) tall fescue in postpartum beef cows with calves. Three weeks before estrus synchronization, cow-calf
Publikováno v:
NZGA: Research and Practice Series. 13:373-375
The objective was to determine whether leptin played a role in abnormal reproductive function in ruminant females fed endophyte-infected (EI) tall fescue. Cow-calf pairs grazed endophyte-free (EF) or EI tall fescue starting in mid-April (early spring
Publikováno v:
Biology of Reproduction. 55:575-581
Changes in oxytocin (OT) receptor expression have been found to be an important determinant of the physiological effect of OT in several species. To date there are no published studies of OT binding sites during pregnancy in the pig. The purpose of t
Publikováno v:
Journal of Dairy Science. 79:536-542
Our objective was to optimize in vitro maturation conditions of bovine oocytes as assessed by embryo development. In Experiment 1, cumulus-oocyte complexes were matured in either M-199 or RPMI-1640. Each medium was supplemented with an antibiotic-ant
Publikováno v:
Journal of Dairy Science. 79:532-535
This study examined the effects of extending oocyte maturation 4 h beyond current methods and capacitating sperm with or without heparin 4 h before oocyte introduction to determine whether embryo development would increase after in vitro fertilizatio
Publikováno v:
Theriogenology. 41:689-696
The cleavage rate of in vitro-matured bovine oocytes was compared after fertilization in 1) TALP medium alone (control); 2) in TALP+BOEC; 3) in TALP+PHE; or 4) in TALP+BOEC and PHE. The overall cleavage rate at 45 h post insemination was greater for
Publikováno v:
Theriogenology. 41:1533-1543
In the first experiment, bovine trophoblastic vesicles (bTV; 46/treatment) were exposed to 1.5 M glycerol, dimethyl sulfoxide, propylene glycol or ethylene glycol for 30 min at room temperature (27° C). Cryoprotectants were removed from bTV by seque
Publikováno v:
Theriogenology. 42:385-395
Experiment 1 compared the development of 2- to 4-cell bovine embryos cultured in synthetic oviductal fluid with 20% fetal calf serum or 3.2% BSA and in the presence of oviductal cells, cumulus cells, or medium alone. More embryos developed in medium
Publikováno v:
Small Ruminant Research. 8:269-273
Thirty-four mature mixed breed dairy does in seasonal anestrus were treated for 14 days with either a 6 mg norgestomet implant or a 45 mg fluorogestone acetate (FGA) sponge. Does also received 12 mg follicle stimulating hormone (FSH) administered at