this pattern occurred under 3 different experimental conditions : ( a ) pregnancy-lactation-weaning , ( b ) pseudopregnancy induced by stimulation of cervix , and ( c ) daily administration of 1 microgram estradiol and 3 mg progesterone to promote mammary development equivalent to that of late pregnancy and subsequent decay of mammary gland after withdrawal of hormonal treatment .
C0032961
pregnancy
C0033308
progesterone