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Blastocyst culture

What is a blastocyst?

In the female body, the egg fertilized at the ampulla of the fallopian tube (oviduct) divides and grows while moving through the oviduct into the uterus. It becomes a blastocyst and enters the uterine cavity about 5 days after fertilization. On the 6th or 7th day, it is implanted on the endometrium to establish pregnancy. The embryo immediately before implantation is called a blastocyst, and blastocyst transfer is a technique by which the embryo grown to this level in vitro is transferred into the uterus.

Indications for blastocyst transfer

Usually, blastocyst transfer is indicated in cases requiring prevention of multiple pregnancy or having a history of failure to become pregnant after repeated attempts of day 2 or 3 transfer. However, at our clinic, cases having problems with oviduct environments are considered to be indications for this procedure.

Cases 1 through 3 are estimated to have problems with the oviduct and are absolute indications for blastocyst transfer in our clinic. With the current methods used for oviduct testing, there is a limit to the diagnosis of organic/functional problems like Case 4, and females qualified by such methods to be free of abnormalities may have occult problems. With this borne in mind, we suspect that oviduct environments involve some problems in cases where pregnancy cannot be established despite repeated attempts of day 2 or 3 transfer, and we consider blastocyst transfer for such cases as well.

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