Estrogen primes the ovulatory cycle by climbing toward ovulation, followed by a drop, and then progesterone dominates the luteal phase.

“estrogen primes progesterone is kind of the really basic top Contour description of the ovulatory cycle that you know estrogen is going to slowly climb toward the the point of ovulation and then there's there's rep and then a drop and then progesterone is going to dominate in the ludal phase”