PSY100Y5 Chapter Notes - Chapter 11: Fetal Alcohol Spectrum Disorder, Prenatal Development, Preterm Birth
13
PSY100Y5 Full Course Notes
Verified Note
13 documents
Document Summary
Development is the sequence of age-related changes that occur as a person progresses from conception to death. the lifespan is divided into four broad periods: the prenatal period (between conception and birth: childhood, adolescence, adulthood. Progress before birth: prenatal development: development begins with conception- when fertilization creates a zygote (a one- celled organism formed by the union of sperm and egg. Cells contain chromosomes, which contain genes (carry details of hereditary blueprints: prenatal period extends from conception to birth, usually encompassing nine months of pregnancy. The course of prenatal development: prenatal period is divided into three phases: Embryonic stage (two weeks to two months) Fetal stage (two months til birth: germinal stage. Begins when zygote is created via fertilization. Within 36 h zygote rapid cell division occurs. On around the 7th day cell begins to implant itself into uterine wall; process takes about a week and many zygotes are rejected at this point.
