Now, as it moves along the blastocyst, it begins to divide in a process known as cleavage. And eventually it forms a structure known as a morala. Now, a morala consists of of these individual, tiny identical cells known as blastomirs. And eventually that morala will make its way to the cavity of the uterus. Now, inside the uterus, we have the lining of the uterus known as the endometrium. And the endometrium contains these special glands that secrete a nutritious fluid.