[Secretion in vitro of 17 beta estradiol by the gonads of female rat fetuses in the presence of various precursors and of dibutyryl cAMP].

Female gonads from Rat foetuses, explanted in the presence of dibutyryl cyclic AMP produce 17 beta-estradiol from 14.5 days of gestation onwards. Production of 17 beta-oestradiol can also be obtained with different delta 5-steroids on day 16 and a half p.c.