In fact, it's the increase in estrogen that creates that surge in LH that actually causes Ovulation to take place in the first place. So these are the hormones and their functions before Ovulation. So let's suppose we have that surge in LH and Ovulation actually takes place. What happens next? Well, we still have the gonadoshop releasing hormone that is produced by the hypothalamus and it still stimulates the interior pituitary gland to continue to produce LH as well as FSH. Now, what LH does post Ovulation is it actually forces the remaining component of the follicle to mature into the corpus luteum to produce the corpus luteum.