Effects of human menopausal gonadotrophin (hMG) for superovulation in Japanese Black cattle.
Sixty-four Japanese Black parous cows were divided into 5 dosage groups (I, II, III, IV, V) and administered either human menopausal gonadotrophin (hMG) or FSH by intramuscular injection. No significant differences were observed between the hMG-treated groups. The average number of recovered ova/embryos in cows treated with 900 IU was significantly greater (P < 0.05) than in cows treated with FSH. The percentage of high-quality transferable embryos was highest in the 600 IU hMG-treated group. Also, FSH-treated cows produced a significantly larger number of unfertilized ova compared to hMG-treated cows. The results suggest that hMG treatment is sufficient for Japanese Black Cattle at a dose of 600 IU for 3 days, and that a 2-day treatment regime is also possible.
Sugano
M
M
Fukushima Animal Husbandry Experiment Station, Japan.
Takano
T
T
Sato
N
N
Ohsaki
J
J
Watanabe
S
S
D000818:Animals; D002417:Cattle; D004624:Embryo Transfer / Q000662:veterinary*; D004971:Estrus; D005260:Female; D005306:Fertilization; D005640:Follicle Stimulating Hormone / Q000008:administration & dosage / Q000494:pharmacology*; D006801:Humans; D007273:Injections, Intramuscular; D008596:Menotropins / Q000008:administration & dosage / Q000494:pharmacology*; D010062:Ovulation Induction / Q000662:veterinary*; D010063:Ovum / Q000166:cytology / Q000187:drug effects; D013480:Superovulation / Q000187:drug effects*
D008596:Menotropins; D005640:Follicle Stimulating Hormone