21. In anovulatory cycles using progestogen-only contraceptives, the endometrium is thin and atrophic. 22. The FSHR is expressed during the luteal phase in the secretory endometrium of the uterus. 23. The decidual cells originate from the stromal cells that are always present in the endometrium . 24. There is an increase of lumican during the proliferative to secretory phase of the endometrium . 25. Humans do, in fact, reabsorb about two-thirds of the endometrium each cycle. 26. Other patients may have no adhesions but amenorrhea and infertility due to a sclerotic atrophic endometrium . 27. Some types of infertility have been associated with dysregulated expression of this gene in the endometrium . 28. During pregnancy, the glands and blood vessels in the endometrium further increase in size and number. 29. An enzyme called plasmin contained in the endometrium tends to inhibit the blood from clotting. 30. If the ovum is fertilized by sperm, it attaches to the endometrium and the fetus develops.
