PSYC 304 Chapter Notes - Chapter 4: Intrauterine Growth Restriction, Low Birth Weight, Congenital Heart Defect
12 Sep 2013
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Document Summary
Just b/c risk is associated with a certain behviaor does not mean that engaging in the bhevaior will ensure that outcome. All sexuality active men and women should be aware of the possibility of a preganancy, the critical period of early weeks of pregnancy, and the wisdom of adjusting their lifestyles to provide a healthy prenatal environment. From moment of conception, it will take around 266 days for the one-celled zygote to go through 3 major phases, andbecome foetus of some 200 billion cells ready to be born. From conception through implantations when the zygote becomes attached to uterus lining and lasts about 10-14 days. As it moves down the fallopian tubes, it undergoes mitosis into 2 cells, then a blastocyst that will contain 60 to 80 cells within 4 days of conception. Its inner layer will become the embryo, while the outer layer will develop into tissues that protect and nourish the embryo.
