So the continued release of LH stimulates the remaining portion of the secondary follicle to become the corpus luteum. So there should be a U here. And that's exactly why the LH is called the luteinizing hormone because it causes the formation of the corpus lutein. Now what the corpus lutein begins to do is it begins to release estrogen and it begins to release another hormone known as progesterone. So if we look at the following diagram, when the corpus luteum is formed, it begins to release estrogen. So we have an increase in estrogen and it also begins to release progesterone, shown here.