to study the effect of prolactin and progesterone on the length of the reproductive cycle in the rat , rats of different estrous cycle length ( four and five days , respectively ) were injected daily ( 09.00 h ) with either bromocriptine ( 1 mg/rat ) or 70 % ethanol vehicle ( 0.25 ml ) from the day of estrus onward , up to the appearance of the next ovulation .
C0033371
prolactin
C0035150
reproductive