PSYC101 Lecture Notes - Lecture 2: Amniocentesis, Obstetrics, Episiotomy
16 Dec 2016
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Document Summary
Fertilization = union of the sperm and egg and begins ovulation. 46 paired chromosomes, with (xx girl) & (xy boy). Uterus = pear-shaped muscular organ that houses the baby. Placenta = wall of uterus during pregnancy in which the baby absorbs nutrients. Birth includes: dilation & effacement, birth then the expulsion of the placenta. Proximodistal sequence (internal-external) - cephalocaudal sequence (top- bottom) Pregnancy across the three trimester & social factors in parental. Third trimester (very large & waiting for birth) Socio-economic status low means more depressed and demoralized. Social support family and friends help to cope with stress. Internal & external threats to the developing baby. External threats: teratogens (any substance that crosses the placenta and harms the fetus) - most likely to harm in embryonic stage. Includes: infectious diseases, medication, recreational drugs, stress, environmental toxins and vitamin de ciencies. Down syndrome (extra chromosome), over 40 (1 in 100), over 45 (1 in 25)
