Outline the three major prenatal periods, describe the events associated with each, and explain how the three germ layers participate in the formation of extra-embryonic membranes.
There are there major prenatal periods: The germinal stage: begins at conception when the sperm and egg cell unite in one... View the full answer
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Answers prenatal stages germinal embryonic fetal Germinal The germinal stage starts when the sperm and egg cell join in one... View the full answer
The three major prenatal periods are 1) Germinal period 2) Embryonic period 3) Fetal period In germinal period the single... View the full answer