Fig. 1.
Photomicrographs of: (A) domestic dog and cat oocytes; (B) a dog oocyte surrounded by several layers of cumulus cells; (C). a dog oocyte after 48 h culture in a medium supplemented with 1 to 10 μg/ml bovine somatotropin; and (D). dog embryos (48 post insemination) derived from in vitro matured oocytes.