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Doctor insights on: Fertilization Of Human Embryo

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Signs of embryo implantation?

Signs of embryo implantation?

Implantation bleed: Implantation bleeding happens 6-7 days after ovulation. Ovulation for mos women happens between days 12-16 from the first day of the period, on average 14 days. Therefore implantation bleeding can occur sometime between day 18 at the earliest and 22 at the latest (days 19-20 for most women). Of course there are exceptions but this applies to most regularly menstruating women. ...Read more

Embryo (Definition)

An embryo is a developing human being from between 1- ...Read more


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What are the causes for failed embryo implantation after embryo transfer?

What are the causes for failed embryo implantation after embryo transfer?

Probabilities: A high proportion of natural embryos do not implant, the same is true for IVF/embryo transfer. Rates improve with pre-screening of the developing embryos, and with younger age of donor (40 have similar rates with donor eggs, very low rates with their own eggs. ...Read more

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How many days after fertilization does the fertilized egg become a blastocyst? Then embryo? What implants-the blastocyst or embryo?

How many days after fertilization does the fertilized egg become a blastocyst? Then embryo? What implants-the blastocyst or embryo?

The process: As the fertilized egg divides, it is first known as a morula. Approximately 5 days from first fertilization it forms into a hollow ball known as a blastocyst. This blastocyst implants and begins to sort itself out into different layers--the inner group becomes the embryo and the outer layer will work to nourish and protect. At approximately 6-7 weeks from time of fertilization, an embryo begins. ...Read more

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8 cell embryo increase chances of implantation?

8 cell embryo increase chances of implantation?

Yes if day 3: Good quality 8 cell embryos are generally what we want to see for day 3 embryo transfer. However, many 8 cell embryos will not implant and sometimes even poor quality embryos will still implant. ...Read more

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Where is the maximum implantation potential of the uterus when transferring an embryo?

Where is the maximum implantation potential of the uterus when transferring an embryo?

About a third: About 1/3 of embryos will be genetically normal and will implant. When the embryos are tested for chromosome abnormalities that goes up to about 70%. ...Read more

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What amount time/days are required for paternal genome and blastocyst development after embryo transfer?

What amount time/days are required for paternal genome and blastocyst development after embryo transfer?

What?: I'm not sure what your question is. 1. If you had a day 3 embryo transfer it will be a blastocyst in 2 days. If you had a day 5 transfer it is already a blastocyst. 2. Paternal genome is working from day one of combination of the two genomes. The dominant genes regardless of maternal or paternal origin take the lead. Sex development is initiated near the 9th week. ...Read more

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What is involved in zygote intrafallopian transfer (zift)?

What is involved in zygote intrafallopian transfer (zift)?

ZIFT: Zygote intrafallopian trasfer (zift) is a laparoscopic surgical procedure where zygotes are placed in the fallopian tube of the female partner. The zygote will continue to grow and eventually migrate to the endometrial cavity to implant. ...Read more

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Can pcos affect the stage of implantation of the fertilized ovum,after the fertilization of ovum implantation can not occur because of pcos factors?

Can pcos affect the stage of implantation of the fertilized ovum,after the fertilization of ovum implantation can not occur because of pcos factors?

Clarify ?: Polycystic ovary syndrome has certain effects on the ability to conceive, but I don't believe that extends to altering the stage of implantation of the fertilized ovum. You really should discuss questions like this to a reproductive endocrinologist, I think that would help in your understanding of the physiology and effects of PCOS ...Read more

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Is 16 eggs fertilized out of 27 in IVF process a good fertilization rate?

Is 16 eggs fertilized out of 27 in IVF process a good fertilization rate?

Its ok: I would focus on the encouraging sign that you had 16 fertilized eggs. Hopefully they will continue to develop ...Read more

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What is zygote intrafallopian transfer?

What is zygote intrafallopian transfer?

ZIFT: Zygote intrafallopian transfer (zift) is a surgical, laparoscopic, procedure where a zygote is placed in the female's fallopian tube. The zygote continues to grow and migrates to the uterine cavity where it implants. ...Read more

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If chances of conception increase in 2 embryo transfer IVF Why doc recomend single embryo?what are risks of 2 embryo apart from twins?

If chances of conception increase in 2 embryo transfer IVF Why doc recomend  single  embryo?what are risks of 2 embryo apart from twins?

It's all about twins: Twins are a little bit trickier pregnancy. Twinning with 2 embryos is as high as 20-30%. In the US the ASRM allows 1 or 2 embryos in a 29 year old woman, but recommends only one. Personally I believe this is patient's choice and do NOT recommend 1 vs. 2, but that's me. Your info says you are 29 and in the UK? I do not know the UK standard of care but the science is the same. Best wishes! ...Read more

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What are the chances of ectopic after frozen embryo transfer?

What are the chances of ectopic after frozen embryo transfer?

Very low: The chances of an ectopic pregnancy after an embryo transfer are very low. As long as the embryo is placed the cavity the chances of tubal pregnancy are very low. ...Read more

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What is the embryo doing from time of fertilization to implantation?

Floating & growing.: The embryo floats down the fallopian tube and enters the uterus where it will implant itself in the uterine wall and establish a blood supply to the mother for further nourisment to continue its development. While floating through the fallopian tube, it has enough nourishment inherent in the egg to divide and grow. ...Read more

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How much time/days are required for paternal genome and blastocyst development after embryo transfer?

What?: I'm not sure what your question is. 1. If you had a day 3 embryo transfer it will be a blastocyst in 2 days. If you had a day 5 transfer it is already a blastocyst. 2. Paternal genome is working from day one of combination of the two genomes. The dominant genes regardless of maternal or paternal origin take the lead. Sex development is initiated near the 9th week. ...Read more

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Will orgasm at the time of possible implantation of a fertilized egg affect the process?

Will orgasm at the time of possible implantation of a fertilized egg affect the process?

Nope: Some people think that an orgasm of the female can cause the cervix to "dip" into a puddle of semen which could enhance delivery of the sperm to the fallopian tubes. But in your scenario, sperm have already been delivered and one of them has penetrated the egg. Orgasm is unlikely to make any difference. On the the other hand, i don't think it will hurt! ...Read more

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Is conception considered when the embryo implants in the uterus?

Is conception considered when the embryo implants in the uterus?

Conception: No. Conception is when a baby is conceived. When the sperm meets the egg. ...Read more