When is the germinal stage of prenatal development

A)  the first three months after conception 
B)  the first two weeks after conception 
C)  from two weeks until the end of the second month after conception 
D)  from two months after conception through birth

The germinal stage is the first stage of prenatal development, which begins at conception and lasts approximately for two weeks. It includes the fertilization of the egg by the sperm and the formation of a zygote that travels through the fallopian tube towards the uterus. During this stage, the zygote undergoes cell division, and it eventually forms a blastocyst that attaches to the uterine wall at the end of the two weeks.