PSY2510 Chapter Notes - Chapter 3: Organogenesis, Apgar Score, Birth Weight
26 Jan 2018
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A woman produces one ovum per month from one of her two ovaries, roughly midway between menstrual periods. If the ovum is not fertilized, it travels from the ovary through the fallopian tube to the uterus where it disintegrates (menstrual period) The sperm travels through the fallopian tubes to the ovum; this results in pregnancy. Every cell in the human body has 23 pairs of chromosomes. Sperm and ovum combine to form a zygote. One x and one y- chromosome is a boy. X - chromosome is one of the largest chromosomes in the body and carries a large number of genes. Cells in a woman"s body carry only x chromosomes. Men carry half x and half y chromosomes. Y- chromosome is small and only carries a few genes. Female embryos that are exposed to androgens either through medication that the mother is taking, or a genetic disorder called congenital adrenal hyperplasia can develop male appearing external genitalia.
