There are no "possible reasons". Every attempt at IVF-ET comes with about 40-50% failure. Make an attempt again after about 3 months. It may succeed.

Success rate for each cycle is 30-40%. Your fertility specialist is the best person to discuss cause of failure and how to improve chances next time.

It needs detailed evaluation Blastocyst is a very good quality But the uterine lining and implantation should also be favourable It has failed to implant

you can get endometrial biopsy once

Discuss with your treating doctor

1) Why it failed? Need to know the grade of blastocyst and have u done Pre genetic screening of embryo ? What is your age if ur age is above 35yrs then genetic anomalies are common leading to implantation failures. 2) implantation was successful or not we need to see if u were on Inj HCG 2000/5000 IU then it is not implanted but if u have not taken HCG injection post transfer then it had implanted giving u biochemical positive result but it didn't grow further. 3) To plan further i would like to know ow ur previous history whether u had similar losses before or any other natural conception losses etc and then we can plan properly further... plus single blast with genetic screening done if ur transferring success rate with single blast is 40%.

Your doctor has been following you since the beginning, im pretty sure they would be the better judge Multiple reasons will be there for not being sucess Like the oocyte quality sperm quality, overall blastocyst quality, endometrium etc Discuss with your doctor if you have to undergo one more cycle of oocyte retreival? And then transfer

You need consultation for proper counselling

- *Why it failed*: Possible reasons are embryo quality, uterine lining issues, or hormonal factors, and embryo selection.

There are several reasons of implantation failure. Connect for more discussion

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