Nonsurgical embryo collection from sows with surgically shortened uteri.
To allow for the nonsurgical collection of swine embryos, the uteri of sows (n=7) were surgically shortened. A section of each uterine horn was resected to facilitate a transcervical flushing procedure. All sows with a shortened uterus exhibited natural estrus at least once after the operation. Four to six days after insemination, embryos were collected with a two-way Foley catheter. Embryos were collected (n=55, 6.3+/-6.0: x +/-SD ) from every treated sow. Although treated sows often did not exhibit estrus beyond 1 to 9 natural estruses, those sows (n=27) with persistent corpora lutea (CL) over a 4 to 5 wk period were given prostaglandin F(2alpha) (PGF(2alpha)) and they returned to estrus in 5.2+/-1.1 d: x +/-SD .
Kobayashi
K
K
Research Laboratory, C. Itoh Feed Mills Co., Ltd. 919 Aoki, Kuroiso, Tochigi, 325-01, Japan.
Hayashi
S
S
Ohtubo
Y
Y
Honda
A
A
Mizuno
J
J
Hirano
S
S