Fetal 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                                 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                              all organ systems functioning; the baby has fingerprints, a skeletal structure, nerves, and circulation
Week 12                              the baby has all of the parts necessary to experience pain, including the nerves, spinal cord and thalamus
Week 17                               baby can have dream (REM) sleep