Production of mouse embryos under in vivo system using exogenous gonadotropins

Abstract

To study monthly and seasonal variations in the quantity as well as quality of mouse embryos, 949 ± 0.67 animals were used for superovulation and subsequent flushing in 237 trials spread over 12 months. Out of these 498 ± 0.62 mice had confirmed copulation plug and 312 ± 0.30 animals responded to superovulation. A total of 3 631 ± 1.19 embryos were recovered of which 2 892± 1.09 and 739 ± 0.32 were of good and poor quality respectively. It was concluded that the month of March was most ideal time for obtaining preimplantation stage embryos.