PSYB32H3 Lecture Notes - Morning Sickness, Pelvic Inflammatory Disease, Preterm Birth
Document Summary
Conception takes place during a woman"s ovulation or within few days of it; the ovum or egg, once released from the mother ovaries lives about 3- 5 days. Prenatal development than encompasses the 38 weeks (9 months) b/w conception and birth. 3 stages (trinesters) (1) zygote (2) the embryo and (3) the fetus. Once the zygote is implanted in the mother"s uterus the second prenatal period begins. Embryo - the developing organism b/w the second and eighth weeks of gestation the period of the embryo comprises the differentiation of the major physiological structures and systems. Gestation the carrying of an embryo or fetus during pregnancy usually for nine months. During the embryo period 3 curcial structures develop to protect and support the baby - 1. Amniotic sac - a membrane containing a watery fluid that encloses the developing organism, protecting it from physical shocks and temperature changes.
