uterine pgf-2 alpha in the guinea-pig was eliminated by hysterectomy on day 9 of the oestrous cycle and an increasing period of reduced pgf-2 alpha availability to the ovary was created by deferring replacement therapy with pgf-2 alpha from day 9 to day 11 , 13 and 15 .
C0025329
oestrous cycle
C0029939
ovary