6 doctors weighed in:
How quickly can conception happen in test tube?
6 doctors weighed in

Dr. Andrew Silverman
Fertility Medicine
3 doctors agree
In brief: Conception
How quickly conception occurs is more of a theological or philosophical question than a biologic one.
If we define conception as evidence of fertilization than within 24 hrs of the addition of sperm to an egg we can see evidence of fertilization; release of the second polar body and two distinct pronuclei one from the egg and one from the sperm. Implantation occurs after embryo transfer.

In brief: Conception
How quickly conception occurs is more of a theological or philosophical question than a biologic one.
If we define conception as evidence of fertilization than within 24 hrs of the addition of sperm to an egg we can see evidence of fertilization; release of the second polar body and two distinct pronuclei one from the egg and one from the sperm. Implantation occurs after embryo transfer.
Dr. Andrew Silverman
Dr. Andrew Silverman
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1 comment
Dr. Khurram Rehman
Good answer
Dr. Marilynn Frederiksen
Obstetrics & Gynecology - Maternal Fetal Medicine
1 doctor agrees
In brief: In Vitro
Conception occurs almost immediately in a test tube.
Dating is easy since the date of conception is known.

In brief: In Vitro
Conception occurs almost immediately in a test tube.
Dating is easy since the date of conception is known.
Dr. Marilynn Frederiksen
Dr. Marilynn Frederiksen
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Dr. Dorothy Mitchell-Leef
Fertility Medicine
In brief: About 18-24 hrs
When egg and sperm are combined in the petri dish (not a test tube) with the invitro fertilization technique fertilization can occur over an 18-24 hour period.
This cannot be observed to have occurred until the petri dish is removed from the incubator after approximately 18-24 hours from the time they were placed together. The exact time cannot be definitely determined..

In brief: About 18-24 hrs
When egg and sperm are combined in the petri dish (not a test tube) with the invitro fertilization technique fertilization can occur over an 18-24 hour period.
This cannot be observed to have occurred until the petri dish is removed from the incubator after approximately 18-24 hours from the time they were placed together. The exact time cannot be definitely determined..
Dr. Dorothy Mitchell-Leef
Dr. Dorothy Mitchell-Leef
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