  A baby's feet at 3 weeks of age in the mother's womb
 This is baby at about seven weeks. Despite being so young and very small (2 cm or 8/10ths of an inch), the seven week old baby is surprisingly well developed. It has a beating heart that circulates its own blood (the maternal and fetal blood do not normally mix); fingers and toes; and many key organs (such as the liver, visible as a large dark spot) have formed, though obviously they have not reached their full size or final location.
 A baby at 10 weeks of age in the mother's womb.
 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
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