PSY 2105 Chapter Notes - Chapter 4.1: Amniotic Sac, Umbilical Cord, Zygote
5 Feb 2018
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Women: born with all the eggs they need in a lifetime. Men: produce sperm in adolescence, as they get older the production slows down and lower quality of the sperm: period of the zygote: Increasing levels of fat in skin (thermal protection) Term for baby around 2 weeks, when egg and sperm fuse week 3 - 8 week 9 - end of pregnancy zygote embryo fetus. Agents that cause abnormal development in the fetus. Can have physical effects (malformation) or psychological effects (intelligence, temperament, activity: types of teratogens: Drugs (e. g. thalidomide, other therapeutic drugs, street drugs, caffeine, nicotine, alcohol. Environmental chemicals (e. g. , mercury, lead, and pcbs ) Maternal infectious diseases ( fth disease get it when pregnant; could lead to disease in baby) Malformations of internal organs and eyes, ears, ngers and toes. Babies of drug-addicted mothers are born addicted and are likely to have developmental problems. May be associated with miscarriage, premature birth or low birth weight.
