PSY 223 Lecture Notes - Lecture 3: Artificial Insemination, In Vitro Fertilisation, Umbilical Cord
Document Summary
Chapter 3 notes: conception, prenatal development, and birth. Development begins long before birth, gestation: period of conception to oxygen. By the end of the first week, differentiation occurs. Fertilization: insemination of an ovum by a sperm. Zygote: sperm and egg fuse together to create a new cell. Placenta: support system, that via the umbilical cord provides food and. Implantation: during the second week, on reaching the uterus, the zygote embeds in the uterus"s nutrient-rich lining. Infertility: failure to conceive after 12 months of sexual intercourse w/o birth control. Three primary factors: couple"s overall health, lifestyle, and age. In vitro fertilization ova surgically extracted and mixed with sperm, When the zygote is firmly attached to the wall of the uterus. Primitive streak thin line down center of embryo that becomes the central. About 1in long, and 0. 04 ounces & all major organs and body parts have nervous system formed.
