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Pregnancy

Pregnancy Calendar: Week 15

Muscle development continues, and your baby is probably making lots of movements with his or her head, mouth, arms, wrists, hands, legs, and feet.

Pregnancy Calendar: Week 16

Your baby can hold his or her head erect, and facial muscles now allow for a variety of expressions, such as squinting and frowning.

Pregnancy Calendar: Week 17

Your baby is still very tiny at about 5.1 inches from crown to rump this week.

Pregnancy Calendar: Week 18

Your baby's bones had been developing but were still soft. This week, they begin to harden, or ossify.

Pregnancy Calendar: Week 19

A waxy substance called vernix caseosa is covering your baby to help protect the delicate skin from becoming chapped or scratched.

Pregnancy Calendar: Week 2

Week 2 is the midpoint of a typical menstrual cycle, when ovulation occurs and conditions are most favorable for fertilization of an egg by sperm.

Pregnancy Calendar: Week 20

You're now halfway through your pregnancy and possibly feeling your baby's first movements, which may begin between weeks 18 and 20.

Pregnancy Calendar: Week 21

Your baby's intestines are developed enough that small amounts of sugars are absorbed from the fluid your baby swallows and passed through the digestive system to the large bowel.

Pregnancy Calendar: Week 22

Brain and nerve endings are formed enough so that the fetus can feel touch, while you might be feeling irregular, painless Braxton Hicks contractions.