Verified Answer :

MissPhiladelphia

The germinal period ends approximately two weeks after conception.  This stage occurs during the first 2 weeks of development (or the 2nd - 4th weeks of pregnancy). The union of the sperm and egg cell forms a single cell called a zygote. 

Answer:

14 days.

Explanation:

The germinal period, during Pre Natal development, has a duration of 14 days.  This process starts with conception and ends with the implantation, fertilisation period. The main process that allow all changes is cell division.

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