in mature and regressing corpora lutea , 1 ) a drastic decrease in progesterone formation from [ 14c ] acetate , 2 ) an increase in estrogen in contrast to a decrease in androgen formation from the two precursors , 3 ) a clear differentiation of theca lutein cells , and 4 ) a more relatively pronounced transformation of pregnenolone to estrogen in regressing than in mature corpora lutea were found .
C1135970
theca lutein cells
C0010092
corpora