And because we have more going onotrop and releasing hormone in the blood system we have more LH and FSH because this positively stimulates the interior pituitary gland. Now, the estrogen also actually directly affects the interior pituitary gland and as a result it releases more LH and FSH into our blood. So we see that more estrogen means more LH and FSH. 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.