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Endometrial biopsy
A doctor may want to take a sample of the endometrium (the lining of the uterus) to see if it seems to be in sync with ovulation. This is not a common test. The endometrium cycles each month--menstruation is how the body sheds extra tissue when pregnancy doesn't occur. This cycle must line up with ovulation so the endometrium is at the correct point in the cycle for an embryo to implant after an egg is ovulated and fertilized. In this procedure, the woman lies down and a speculum is inserted to hold the vagina open. A thin catheter is inserted through the cervix into the uterus, and a tiny sample of the endometrium is sucked out. This can be done with or without anesthesia. The sample will be examined to see if the endometrium seems to be prepared for pregnancy.
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