More health/sex questions I forgot to add. And thanks for the answers?
Sunday, December 19th, 20104. For how many weeks after conception is the newly fertilized egg known as an embryo?
A two
B four
C six
D eight
5. Implantation is best described as which of the following?
A fusion of egg and sperm to form a zygote
B embedding of the young embryo in the uterine lining
C formation of basic body layers
D placenta completion and attachment