PSY 302 Lecture 3: Prenatal Development
Document Summary
Average pregnancy is 266 days, 9 months, 38 weeks. Implantation (zygote embeds itself in uterine lining and becomes dependent on mother for sustenance) Outer: supporting system: placenta, umbilical cord, amniotic sac. Sensory structures are present relatively early in prenatal development. Hearing: responds to sounds (6th month of gestation) Vision: limited but will orient to external light. At birth preferences for smells and tastes that are familiar because of prenatal exposure. Habituation (30 weeks) (simple form of learning that involves a decrease in. Habituation (30 weeks) (simple form of learning that involves a decrease in response to repeated or continued stimulation) Dishabituation (introduction od new stimulus rekindles interest following habituation to repeated stimulus) Learning and memory (last 6 weeks of pregnancy) The first stage of labour (8-14 hrs for the first born and 3-8 hours for later- borns) The second stage of labour (delivery) (1/2 hr to 1. 5 hr) The third stage of labour (after birth) (5-10 min)
