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Fetal Development

Week 1

Last Menstrual Period

Week 2

When Conception occurs, the baby’s features, including sex, hair, and eye color, are determined.

Week 3

Baby attaches to the uterus.

Week 4

Nerves, brain, and spinal cord begin to develop.

Week 5

The baby’s heart begins to beat.

Week 6

Eyes, arms, legs, lungs, and stomach begin to form.

Week 7

Hands and feet are forming.

Week 8

Upper lip, teeth, fingers, and ears begin to form.

Week 9

Toes and genitals are forming.

Week 10

Baby has permanent fingerprints.

Week 11

Baby starts to produce urine.

Week 12

Fingernails are forming.

3.5 Months

4 Months

The baby can hear sounds, including his or her mother’s heartbeat.

5 Months

6 Months