PSY-2012 Chapter Notes - Chapter ch 4: Fetal Alcohol Spectrum Disorder, Spina Bifida, Prenatal Development
Document Summary
Time from conception to when the zygote implants. Heartbeat begins; recognizable body parts appear; sexual differentiation begins. Increase in size and systems begin to function. Last 3 months: period of rapid growth. Leads to unhealthy behaviors such as smoking or drinking alcohol. Neither too young, nor too old is best. Many diseases pass through the placenta directly and attack the fetus; others attack at birth. E(cid:374)(cid:448)i(cid:396)o(cid:374)(cid:373)e(cid:374)tal haza(cid:396)ds a(cid:396)e t(cid:396)ea(cid:272)he(cid:396)ous (cid:271)e(cid:272)ause (cid:449)e"(cid:396)e ofte(cid:374) u(cid:374)a(cid:449)a(cid:396)e of thei(cid:396) p(cid:396)ese(cid:374)(cid:272)e. Even moderate drinking (1 drink per day) may cause significant problems. With heavy drinking: fetal alcohol syndrome may occur. Heavy drinking = 5 or more drinks per day. The impact of a teratogen depends on the genotype of the organism. The impact of teratogens changes over the course of prenatal development. Most growth is in size/complexity of neurons, not addition of new neurons. Most crawl, stand, and walk at roughly same ages. Coordination, general processing speed increase throughout childhood.
