All through the first-trimester duration of Prenatal development, the unborn infant is maximum susceptible to growing a structural defect because of the effects of a teratogen
Prenatal development, also known as antenatal improvement, in humans, is the technique encompassing the duration from the formation of an embryo, thru the development of a fetus, to birth (or parturition).
Prenatal development includes the improvement of the embryo and of the fetus throughout a viviparous animal's gestation. Prenatal development starts with fertilization, in the germinal degree of embryonic development, and continues in fetal development till the start. The technique of prenatal development happens in 3 foremost ranges. the primary two weeks after theory are referred to as the germinal stage, the third thru the 8th week is referred to as the embryonic duration, and the time from the 9th week until birth is known as the fetal period.
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