Comparison of growth<i>in vitro</i>and<i>in vivo</i>of post-implantation rat embryos

Abstract

Rat embryos explanted at early head-fold stage and grown in vitro by improved culture methods were compared with littermates in vivo. Very similar rates of growth and differentiation were obtained over a period of 48 h, while the embryos developed to around the 25-somite stage.