PSY210H1 Lecture 4: PSY210 Lecture 4: Lecture and Textbook Notes
Document Summary
Human development is about change over time (rates) Morula: 8 cell mass in spherical form, 3-4 days post fertilization. Blastocyst: cell mass with a cavity 4-5 days post fertilization which contains inner and outer lining which will become embryo and placenta. Implantation: beginning about 1 week post conception in which the organism surrounds into the uterine lining for nourishment. Geminal period: first 2 weeks of development after conception > rapid cell division and beginning of cell differentiation. Embryonic period: 3rd-8th week post conception > rudimentary forms of all anatomical structures develop. Fetal period: 9th week post conception until birth > organs grow in size and complexity, baby gains 7 lbs. Primiparous: a pregnant women who has not given birth or only given birth once. Multiparous: a pregnant women who has given birth more than once. Gestational age: fetal age given from the time of ovulation, at the beginning of pregnancy.
