Chapter 10: Human Development Across the Life Span
Progress Before Birth:
Prenatal Development
3 phases
germinal stage = first 2 weeks
conception, implantation, formation of placenta
embryonic stage = 2 weeks ? 2 months
formation of vital organs and systems
fetal stage = 2 months ? birth
bodily growth continues, movement capability begins, brain cells multiply
age of viability
Figure 10.1 Overview of fetal development
Environmental Factors
and Prenatal Development
Maternal nutrition
Malnutrition linked to increased risk of birth complications, neurological problems, and psychopathology
Maternal drug use
Tobacco, alcohol, prescription, and recreational drugs
Fetal alcohol syndrome
Environmental Factors
and Prenatal Development
Maternal illness