Data on development of post-implantation rat embryos in a 24-hr culture

Cumulative data on growth, differentiation and development of control rat embryos over a 24-hr culture period (day 10-11 post-insemination) are presented. Cultures were performed in pure rat serum supplemented with 0.5% gelatin, with embryos at 5-8 somites at the start of the culture, according to New's technique. The embryos were evaluated according to the morphological scoring system of Brown and Fabro. Results are given, showing the repartition for each final somitic age, for the following parameters: yolk sac diameter, crown-rump length, head length, total score of development, and scores of development of 16 different territories. Viability of embryos, and the number and type of anomalies are also presented. Data were collected on 144 control embryos.