after reaching the sperm in egg how much time later pregnancy happens

Asked by anshubhardwaj | 17th Nov, 2009, 05:32: PM

Expert Answer:

After fertilization occurs, the ovum remains in the fallopian tube for about 72 hours. During this time there are several cellular division, but the size of the fertilized ovum does not increase. Around 72 hours the zona pellucida fragments and falls away. The ovum enters the uterine cavity for 60 to 72 more hours, and the central cavity begins to form. A definite cell mass is formed on one side of the blastocyst by the time implantation occurs. 

Answered by  | 18th Nov, 2009, 09:16: AM

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