If you are one of those couples who are thinking about in-vitro fertilization (IVF) to conceive, you might also be familiar with the term frozen embryo transfer (FET). Fertilized eggs that have been frozen, or cryopreserved embryos from a previous IVF round or a donor, are used in FET. It is a kind of IVF treatment. FET can save time and money, enabling genetic screening and lowering the likelihood of multiple pregnancies, among other advantages. Here, we will discuss FET, its timeline, different stages, and answers related to it.

What is exactly an Embryo Transfer?

An Embryo Transfer is a procedure of implanting a newly produced embryo inside the woman’s uterus with the help of a fertilized egg and sperm. The doctor will make sure that the catheter will prevent coming into contact with your cervix. It is because the ultrasound allows them to see exactly where the catheter should be placed. If this happens, then also you will feel only a slight cramping feeling.

What is the Frozen Embryo Transfer timeline?

It takes around nine days following the completion of the frozen embryo transfer step by step to detect pregnancy. The embryo experiences the following in the days after a transfer:

Day 1: The blastocyst starts to emerge from its shell.

Day 2: The blastocyst will emerge from its shell and attach to the uterus.

Day 3: The blastocyst will attach itself more firmly to the uterine lining.

Day 4: The implant process goes on.

Day 5: The implant process is finished. The development of the cells that will eventually become the placenta and fetus has started.

Day 6: The hCG hormone indicates a growing pregnancy and begins to enter the bloodstream.

Days 7 and 8: The fetus is still developing and secreting hCG.

Day 9: A blood test can identify a pregnancy because the mother’s hCG levels are high enough.

How much time does it take to implant IVF?

After fertilization, an egg takes four to five days to pass via the fallopian tubes and enter the uterus. In general, it can take anywhere from six to ten days for successful frozen embryo transfer. Your doctor will transfer the eggs two to five days later after removing them. The gynecologist will decide this time depending on how mature the embryo is. It is transferred only after the uterus lining is ready to hold it. You can get pregnant in 10 to 12 days after this step.

Why to select frozen embryo transfer?

There are several reasons to choose frozen embryo transfer, like inserting a non-Frozen Embryo into the uterus. Others include:

• Extra embryos from a prior IVF cycle will be in your possession. Following egg retrieval, you may decide to preserve any extra high-quality embryos for later use if you have more than one or two eggs. If the fresh transfer doesn’t work out or if you decide to try again later, you can also use them.

• Your health problems might make a new transfer impossible. Certain women may have medical issues, including endometriosis, polycystic ovarian syndrome (PCOS), or ovarian hyperstimulation syndrome (OHSS), that make a fresh transfer risky or less likely to succeed. FET might be a preferable choice in certain circumstances.

Doctors might implement natural and medicated methods for the frozen embryo transfer cycle. The primary difference between these two is whether to use medicine to inhibit your ovulation and regulate the growth of your uterine lining or not.

FAQ

Does ageing impact transfers of frozen embryo transfer?

Numerous variables, including your age, the caliber and quantity of embryos transferred, and the reason for your infertility, affect the success rates of frozen embryo transfer step by step. Research indicates that the success rates of FET are either slightly higher or similar to those of fresh embryo transfer. SART, the Society for Assisted Reproductive Technology, reports that in 2018, the live birth rates per FET cycle were

• 40.9% for women
• 41.3% for women under 35. 35–37
• 37.9% of females 38–40
• 33.6% of females 41–42
• For women over 42, 26.6%

End Thoughts

Every couple plans their pregnancy differently when they are contemplating parenthood. Due to advanced technologies, they can consider assisted reproductive technologies or simply research other options. They always try to do the best for their future child. Nowadays, due to ART methods, couples can think about fulfilling their aspirations of having a healthy child. 

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