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    Fresh ET Vs Frozen ET

    Frozen Embryo Transfer (FET) is done after embryos are prepared and transferred after few menstrual cycles. In a Fresh IVF cycle, embryos are prepared and transferred into uterus during the same cycle. There are various benefits of FET over a fresh cycle embryo transfer; firstly the success rate in case of women over the age of 35 years was quite high as compared to the ones who had a fresh cycle embryo transfer. Secondly, the patients that had elevated levels of progesterone hormone before egg retrieval. This has inspired the fertility experts to think if other patients can benefit from the freeze- all approach.


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    What is Embryo Transfer?

    Embryo Transfer or ET is the last step performed during In vitro Fertilization treatment. ET is done in a transfer room near a laboratory and it can be similar to a Pap smear procedure. This process involves a speculum being inserted into the vaginal cavity so that the catheter is inserted smoothly and the embryo is gently placed inside uterus. The entire procedure takes place under the ultrasound guidance for ensuring accuracy. ET technique has developed over time and unlike past when a number of embryos were transferred to ensure a decent success rate, only single embryos are transferred at present.


    What are the Stages for Embryo Growth?

    Different stages of embryo development begin with Zygote right after the fertilization in fallopian tubes. Zygote is the single cell that undergoes the first cell division called as mitosis. It is followed by four and eight cell stages acquired through the day 3 of the development process. The embryo, once in Morula stage, which is the 16 cell stage at day 3, becomes strong enough to get implanted in the uterus yet the blastocyst stage reached by day 5 is usually preferred for embryo transfer in IVF treatment. The early blastocyst has zona pellucida as the our wall of the embryo, embryo blast that is the inner cell mass, trophoblast that forms the inner cell lining of the embryo and a blastocyst cavity that gives rise to alimentary canal. Trophoblast gives rise to placenta during the development of the blastocyst into a fetus during the later stages.


    Why FET is Required?

    Frozen Embryo Transfer or FET is an ART technique that allows women to have a control over their fertility. It enhances the chances of an IVF cycle when there is a heightened risk of ovarian hyperstimulation, a condition when the ovaries get inflamed and the hormonal mismatch between the ovaries and the uterine lining interfere with the implantation. FET is known to give better results than fresh IVF cycles.