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Doctor insights on: What Does It Feel Like When The Embryo Implants

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How many cells does an embryo have to be before it implants? When does cell division start?

How many cells does an embryo have to be before it implants? When does cell division start?

Cell division starts: Right after fertilization. The blastocyst is the preimplantation embryo. It has a varying cell number (30 to 200). ...Read more

Dr. Louis Gallia
5 doctors shared insights

Implant (Definition)

An implant is a medical device manufactured to replace a missing biological structure, support a damaged biological structure, or enhance an existing biological structure. Medical implants are man-made devices, in contrast to a transplant, which is ...Read more


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Why does an embryo not implant after transfer?

Why does an embryo not implant after transfer?

Great question: In most cases we do not know. Some reasons: 1) poor quality, old, or abnormal embryo, some estimate only 1 embryo in 4 will be successful, 2) inappropriately developed endometrium, which can happen if too much/too little Progesterone before transfer, 3) bad placement or rough/difficult transfer. Many things we still do not know! ...Read more

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Do frozen embryo transfers implant quicker than fresh?

Do frozen embryo transfers implant quicker than fresh?

Not really: Human embryos, whether natural or from ivf. Forzen or fresh, always implant between 6-7 days after fertilization. ...Read more

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Can a embryo take up to three weeks to implant? What's the longest it's been known to take?

Can a embryo take up to three weeks to implant? What's the longest it's been known to take?

Please clarify?: A human embryo can implant 6-7 days after fertilization, and will produce detectable hCG (if the pregnancy proceeds normally) by about 10-11 days. This is 2-3 days before the expected period. An embryo cannot implant as late as 3 weeks after fertilization. I hope this helps, please submit again and clarify if you are asking a different question. Good wishes. ...Read more

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How many cells does an embryo have before it implants? How long is the cell division process before implantation?

Embryo Cell number: At fertilization, one sperm enters the egg cell (2 cells) and in short while the egg nucleus and sperm nucleus merge to form one cell, called a zygote. The sperm and the egg each had 23 chromosomes, . ...Read more

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Does embryo implant two days after fertilization?

Does embryo implant two days after fertilization?

No: The embryo usually implants about a week or so after fertilization, when it reaches the blastocyst stage. ...Read more

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How many cells does an embryo/blastocyst have before it implants? And how many days after its fertilized does it implant?

How many cells does an embryo/blastocyst have before it implants? And how many days after its fertilized does it implant?

About a week: Implantation generally occurs about a week after fertilization. By this time, the embryo is called a blastocyst, which is a ball of many cells (up to hundreds) divided into regions called the trophoblast (the part that will become the placenta) and inner cell mass (part that will become the baby). ...Read more

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How long does it take for an embryo to implant after sex and fertilization?

How long does it take for an embryo to implant after sex and fertilization?

7 to 10 days.: It takes about 7 to 10 days for the fertilized egg to travel down the tube and implant in the uterus. You might see implantation bleeding as early as 4 to 7 days before a missed period. ...Read more

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Why would a embryo transfer of a excellent quality blastocyst fail to implant? What should I ask at follow up?

Why would a embryo transfer of a excellent quality blastocyst fail to implant?  What should I ask at follow up?

Possible reasons ...: Could be - 1) genetic or metabolic abnormalities in the embryo, 2) problems with the lining of your uterus including polyps, or 3) difficulties with the embryo transfer itself. For 2) you should have had a saline sonogram (shg) or other procedure to check your cavity and ultrasounds to check your lining. Single embryo transfer (set) has a lower pregnancy rate than 2 embryos, even if you're young. ...Read more

Embryo (Definition)

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