PSYC 2450 Chapter Notes - Chapter 4: Intrauterine Growth Restriction, Fetal Alcohol Spectrum Disorder, Umbilical Cord

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2450
• Professor: Anneke Olthof

Document Summary

Prenatal development-development that occurs between moment of conception and birth. Inside womb, three stages as well, but stages pass quickly as organism becomes a zygote, then embryo, and finally fetus. Transition from embryo to fetus occurs at 8 weeks, Full month before pregnant woman enters second trimester of pregnancy often, before aware she is pregnant. Foundations for all of embryo"s major organs formed. Rest of the prenatal period time of growth, developing function, and refinement of organs and structures. Moment of conception, take approximately 266 days for zygote to become a fetus ready to be born. Period of zygote (or germinal period), lasts from conception through implantation, when zygote becomes firmly attached to wall of uterus. Period of the embryo, beginning of third week through end of eighth. All major organs formed , heart begins to beat. Period of fetus, lasts from ninth week of pregnancy until child is born.