4. Gestation is the length of time from conception to birth, usually nine months; forty weeks. It is calculated from the first day of the last menstrual period, with a range from 259-280 days. A baby born before 37 weeks gestation is considered premature. GestationThe time required for the development of a fetus
6. Weeks 1-12 Week 1-8 called an embryo Weeks 8-12 called a fetus All major organs and body systems are formed First Trimester
7. Weeks 13-27 Women start to look pregnant and may begin to wear maternity clothes Easiest stage of pregnancy Morning sickness usually subsides Second Trimester
8. Week 28-Birth Full term is 37-42 weeks Baby grows and organs mature Frequent fetal movement Discomfort increases as delivery nears Third Trimester