Baby Development

Baby at 7 weeks



Baby at 8 weeks



Baby at 11 weeks



Baby at 3-1/2 Months



Baby at 4 months



Baby at 5 months



Baby at 6 months

Day 1 – fertilization: all human chromosomes are present; unique human life begins

Day 6 – embryo begins implanting in the uterus

Day 22 – heart begins to beat with the child’s own blood, often a different type than the mother’s

Week 5 – eyes, legs, hands begin to develop

Week 6 – brain waves detectable; mouth, lips present; fingernails forming

Week 7 – eyelids, toes form; nose distinct, baby kicking and swimming

Week 8 – every organ in place; bones begin to replace cartilage, fingerprints begin to form;

Weeks 9 and 10 - teeth begin to form, fingernails develop; baby can turn head, frown

Week 11 – baby can grasp objects placed in hand; all organ systems functioning; the baby has fingerprints, a skeletal structure, nerves, and circulation

Week 12 – the baby has all of the part necessary to experience pain, including the nerves, spinal cord and thalamus; the baby is nearing the end of the first trimester

Week 17 - baby can have dream (REM) sleep