Ideas in this flowchart

• Pregnancy is a developmental process lasting about forty weeks.
• Pregnancy is divided into three trimesters.
• The first trimester spans weeks one through twelve.
• The second trimester spans weeks thirteen through twenty-seven.
• The third trimester spans week twenty-eight through birth.
• Conception begins the sequence of embryonic and fetal development.
• A sperm cell fertilizes an egg cell, creating a zygote.
• The zygote rapidly divides into multiple cells and becomes an embryo.
• The embryo implants in the uterine wall and develops into a fetus.
• Pregnancy includes major developmental and medical milestones.
• At eight weeks, nerve cells branch to form primitive neural pathways.
• At twenty weeks, physicians typically perform an ultrasound to examine the fetus and check for abnormalities.
• By twenty weeks, the baby's sex may be known.
• At twenty-eight weeks, the unborn baby begins adding body fat for life outside the womb.
• A pregnant woman's nutritional choices influence health throughout pregnancy.
• Nutrition affects fetal development.
• Nutrition affects the pregnant woman's own health.
• Nutrition affects the future health of the newborn.