luteal cells from early corpora lutea produced more progesterone ( 4.73 +/- 0.84 nmol/10 ( 6 ) cells , day 3 ) than those from late diestrus ( 0.73 +/- 0.04 nmol/10 ( 6 ) cells , day 15 ) ;
C0024156
luteal cells
C0010092
corpora lutea