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Doctor insights on: Approximate Time Span Between Fertilization And Implantation Of Blastocyst

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Is hCG produced at time of fertilization (when sperm meets egg) or only when implantation occurs?

Is hCG produced at time of fertilization (when sperm meets egg) or only when implantation occurs?

A little after: Hcg can be screted by the embryo after fertilization and before implantation. However, HCG is likely detected by testing after implantation. ...Read more

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Implantation (Definition)

One common meaning refers to the process by which an embryo attaches to the uterus of a woman so that she is pregnant. Many think of it as 'sticking.' implantation in humans always occurs when the embryo is between 6-7 days old. A very popular concept on the internet now in 2012, 'implantation bleeding, ' is speculative ...Read more

Dr. Michael Swor
Board Certified, Gynecology
34 years in practice
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What is the embryo doing from time of fertilization to implantation?

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

Dr. Michael Swor
Board Certified, Gynecology
34 years in practice
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I think i used flonase, zatidor, and a steriod cream sparingly before implantation. Did the few times i used them hurt the blastocyst?

I think i used flonase, zatidor, and a steriod cream sparingly before implantation.  Did the few times i used them hurt the blastocyst?

Doubt it: None of these medications poses a high risk for fetal anomaly especially when they are only applied topically. ...Read more

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Can implantation of a blastocyst occur a day or so after an abortion?

Can implantation of a blastocyst occur a day or so after an abortion?

Unlikely: While anything is possible, the transfer of a blastocyst to the uterine cavity the day or two softer an abortion would very likely not result in implantation and pregnancy success. ...Read more

Board Certified, Gynecology
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Is it true that the copper IUD allows fertilization but not implantation?

Is it true that the copper IUD allows fertilization but not implantation?

No: Both types of iud change the environment in the tube (where fertilization takes place) so fertilization doesn't occur. ...Read more

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Fertilization, implantation, gestation, what are these?

Definitions: Fertilization refers to sperm getting inside the egg and their DNA mixing to form an embryo. Implantation is when that embryo burrows into the wall of the uterus. Gestation refers to a pregnancy. ...Read more

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How come i hear different things about when hCG is produced? Is it produced after implantation (week after fertilization) or before implantation?

How come i hear different things about when hCG is  produced?  Is it produced after implantation (week after fertilization) or  before implantation?

After: The earliest detection in the blood for HCG is approximately 9-11 days after ovulation which is right after implantation. ...Read more

Blastocyst (Definition)

We use this term for one of the early phases after fertilization, in which the mass of cells produced by the division of the fertilized egg has acquired a central cavity, making it hollow, and one can tell which cells will become ...Read more

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Dr. Michael Swor
Board Certified, Gynecology
34 years in practice
3.0M people helped
Continue
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