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The germinal period is the shortest period of prenatal development, lasting approximately two weeks. This period begins at fertilization when the egg is fertilized by sperm and ends when the fertilized egg attaches to the uterine wall.
The fetal period.
The first period of prenatal development is the germinal stage, which lasts for the first two weeks after conception. During this stage, the fertilized egg, or zygote, undergoes rapid cell division and eventually forms a blastocyst. The blastocyst implants itself into the uterine wall, marking the end of the germinal stage.
embryonic
First Stage: The first two weeks after conception are known as the Germinal stage. Second Stage: The next six weeks of development are known as the Embryonic stage. Third Stage: The remainder of prenatal development is known as the Fetal stage.
The embryonic period occurs from the beginning of fertilization to about the 8th week after conception
The prenatal period is anytime from the time of conception until the baby is born.
18-22 days 18-22 days
distinguish between prenatal & postnatal
During prenatal development, a particular organ or body part is most vulnerable to exposure to teratogens during its:
No, taking prenatal vitamins won't impact on your period. Prenatal pills are typically vitamins, which could see you have a better period all together, but won't be a major change.
Prenatal development begins at the moment of conception when a sperm fertilizes an egg to form a zygote. This zygote then undergoes rapid cell division and differentiation, eventually developing into a fetus.