摘要: MOUSE ova at the eight-celled stage consistently developed into blastulae when cultured in Krebs–Ringer bicarbonate containing glucose and crystalline bovine albumin1. It has since been shown that albumin may be replaced by egg albumin, or even glycine (0.003 M) other simple amino-acids peptides. These findings indicate mouse do not require any specific tubal factor this stage, conditions necessary for development closely resemble those which extend functional life of gametes some marine invertebrates2.