Developmental competence of oocytes from the ovaries of repeat-breeding cows after in vitro fertilization.
The present study examined the developmental competence of oocytes from the ovaries of repeat-breeding cows after in vitro fertilization (IVF). The number of oocytes recovered from eight repeat-breeders averaged 45. Following IVF, the average number of blastocysts obtained was 5 (range from 1 to 7) per cow. Twenty-two frozen-thawed blastocysts were transferred to recipient animals and produced nine pregnancies (41%). Eight normal calves were subsequently born.
Tanaka
H
H
Department of Theriogenology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
Hishinuma
M
M
Takahashi
Y
Y
Kanagawa
H
H
D000818:Animals; D001755:Blastocyst / Q000166:cytology / Q000502:physiology; D002417:Cattle / Q000502:physiology*; D002455:Cell Division; D005260:Female; D005307:Fertilization in Vitro / Q000662:veterinary*; D009865:Oocytes / Q000166:cytology / Q000502:physiology*; D010053:Ovary / Q000166:cytology / Q000502:physiology*; D010298:Parity