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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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Dr. Michael Swor
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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


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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

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Dr. Michael Swor
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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

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Dr. Michael Swor
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Does spotting sometimes occur during fertilization? Not implantation, but fertilization. Also, are bananas ok to eat during the tww?

Does spotting sometimes occur during fertilization? Not implantation, but fertilization. Also, are bananas ok to eat during the tww?

Anytime: Spotting can occur at any time in a cycle, there is nothing about fertilization that causes spotting. They are not related. You can eat bananas anytime you like, they are good for you. Best wishes. ...Read more

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When do ovulation and fertilization occur when can I get pregnant and when do implantation occur?

When do ovulation and fertilization occur when can I get pregnant and when do implantation occur?

Ovulation can be: Variable; I have seen it from cd 9 up to cd 25 in the office. The "usual" ovulation is close to cd 14 in a textbook 28-day cycle. You can generally get pregnant from about 2 (maybe 3) days before ovulation up to the day. If you get pregnant it is 1 day at most after ovulation; implantation always happens 6-7 days afterwards. ...Read more

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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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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
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