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Risk factors
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Biological and environmental conditions associated with the increased probability of developmental problems.
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Biological risk
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The risk associated with damage to a child's developing systems before, during, or after birth.
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Environmental risk
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Risk factors related to the environment in which a child develops.
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Prenatal period
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The period from conception to birth.
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Perinatal period
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The period from the twelfth week of pregnancy to the twenty-eighth day of life.
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Postnatal period
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The period from the twenty-eighth day of life through the end of the first year.
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First trimester
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The first three months of pregnancy.
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Teratogens
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A substance that can cause birth defects.
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Rubella
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Also known as german measles; a highly contagious virus that can cause severe damage to the fetus if contracted by a mother in the first sixteen weeks of pregnancy.
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Cytomegalovirus (CMV)
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A relatively common infection that if contracted by a pregnant woman can cause microcephaly, mental retardation, neurological impairments, and hearing loss in the surviving infant.
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Congenital
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A condition present at birth.
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Sexually transmitted diseases (STDs)
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Diseases spread through sexual intercourse.
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Acquired immune deficiency syndrome (AIDS)
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A viral disease that breaks down the body's immune system, destroying its ability to fight infections; AIDS is transmitted by the exchange of body fluids that can occur through sexual contact or sharing contaminated needles to inject intravenous drugs.
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Human immunodeficiency virus (HIV)
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The virus that causes AIDS.
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Thalidmomide
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A drug prescribed to pregnant women in the 1950's that caused severe birth defects.
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