Good eggs and a healthy embryo aren't enough to assure pregnancy during IVF. A receptive uterine lining (endometrium) is also critical for successful implantation after embryo transfer. A commonly used parameter for assessing the endometrium is to measure its thickness (endometrial thickness, EMT).
During the stimulation phase of IVF, EMT usually increases in response to estrogen released by the ovaries. EMT is now routinely measured using transvaginal ultrasound during in vitro fertilization (IVF).
Some studies have suggested that a thin lining is associated with low IVF pregnancy rates, whereas others were not able to confirm this. Despite this, it is generally accepted that a "thick" lining will be most receptive for the embryo(s) after transfer.
Here are ten facts you will probably want to know if you have questions about EMT:
The technique of measuring EMT is critical. When using a vaginal-probe ultrasound, it is important that the bladder be empty and the patient should be positioned so that manipulation of the transducer is possible. The endometrium should be measured in the long-axis or saggital plane. The measurement is of the thickest echogenic area from one basal endometrial interface across the endometrial canal to the other basal endometrium. Care should be taken not to include the hypoechoic myometrium in the measurement (see picture above).
Make an appointment at one of InVia’s four Chicago area fertility clinics to speak with a board-certified, compassionate physician who wants to help you on your path to pregnancy.
IVF InVia Fertility Specialists Top 10 Endometrial Thickness
Dr. Karande is Board Certified in the specialty of Obstetrics and Gynecology as well as the subspecialty of Reproductive Endocrinology and Infertility. He is a Fellow of the American College of Obstetricians and Gynecologists and Member of the American Society for Reproductive Medicine.
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