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Embryo transfer refers to a step in the process of assisted reproduction in which embryos are placed into the uterus of a female with the intent to establish a pregnancy.This technique - which is often used in connection with in vitro fertilization (IVF) - may be used in humans or in other animals, in which situations and goals may vary.
Menstruation is a signal that the uterus is functioning well and may be able to support a pregnancy. Endometrial preparation for embryo transfer first involves an estrogen preparation step, to prepare and thicken the endometrium, and subsequently progesterone is prepared, to return the endometrium receptive. [57]
The implanted embryo will receive oxygen and nutrients in order to grow. For implantation to take place the uterus must become receptive. Uterine receptivity involves much cross-talk between the embryo and the uterus, initiating changes to the endometrium.
A frozen embryo transfer first involves one of the cycles dedicated to the genetic mother. The second cycle is dedicated to the carrier mother. The actual timing for a frozen embryo transfer is longer and depends on the entire time it takes for two menstrual cycles of the two intended parents and how they line up. [14]
Menstrual cycle The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that makes pregnancy possible. The ovarian cycle controls the production and release of eggs and the cyclic release of estrogen and progesterone. The uterine cycle governs the preparation and maintenance of the lining of the ...
Embryo transfer is the step in the process whereby one or several embryos are placed into the uterus of the female with the intent to establish a pregnancy. Less commonly used techniques in in vitro fertilization are: Assisted zona hatching (AZH) is performed shortly before the embryo is transferred to the uterus. A small opening is made in the ...
The first IVF procedure was a wash—her doctor wasn’t able to do a transfer because none of the embryos ended up being viable after testing. The same thing happened with the second round.
At the time of embryo transfer, it is favorable to have an endometrium of a thickness of between 7 and 14 mm with a triple-line configuration, [21] which means that the endometrium contains a hyperechoic (usually displayed as light) line in the middle surrounded by two more hypoechoic (darker) lines.