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Fetal Development
What are the normal stages of fetal development?
Day 1: Fertilization occurs.
Day 6: Embryo implants in the uterus.
Day 18: Human heartbeat can be detected.
Day 21: Foundations for many organs are apparent.
Day 31: Human anatomy (arms, legs, etc. ) develops
Day 38: Every muscle block is present; baby begins moving independently
Day 40: Brain waves can be detected.
6 Weeks: EKG and EEG can be done; fingers and toes are forming.
8 weeks: Every organ system is present, baby is swimming in amniotic fluid.
12 Weeks: Baby has sleep / wake cycle, digests food, swallows, excretes, breathes amniotic fluid, has vocal cords, and cries.
16 Weeks: The baby's gender can be determined by ultra sound
22 Weeks: By this age the baby's eyelashes can be seen and the lungs are developed
See the ultra sound picture below
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