[Bovine 17-beta-estradiol during estrous cycle].

Using a highly specific antiserum, a method of plasma estradiol-17 beta determination by R.I.A.

[Radioimmunoassay of bovine serum progesterone].

Radioimmunoassay determination of plasma progesterone in the cow without chromatographic purification was developed. The level ranged from 0.6 ng/ml during estrus to 6.