What Are The 3 Periods Of Prenatal Development? This union marks the beginning of the prenatal period, which in humans encompasses three distinct stages: (1) the pre-embryonic stage, the first two weeks of development, which is a period of cell division and initial differentiation (cell maturation), (2) the embryonic period, or period of organogenesis, which
Is Fetal Alcohol Syndrome Genetic Or Congenital? Fetal alcohol syndrome (FAS) is a group of abnormalities in babies born to mothers who consume alcohol during pregnancy. It is the most common known non-genetic (non-inherited) cause of mental retardation in the United States. Is Fetal Alcohol Syndrome a congenital disorder? fetal alcohol syndrome (FAS), various congenital
What Happens During The Fetal Stage Of Development? Stages of development: During the fetal stage, the brain develops and the body adds size and weight, until the fetus reaches full-term development. Throughout the fetal stage the brain continues to grow and develop, nearly doubling in size from weeks 16 to 28. What physical changes occur
What Environmental Influences Can Affect Prenatal Development Quizlet? What environmental influences can affect prenatal development quizlet? -Important environmental influences involving the mother include nutrition, physical activity, smoking, intake of alcohol or other drugs, maternal illness, maternal stress, maternal age, and external environmental hazards, such as chemicals and radiation. What environmental influences can affect prenatal development?