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may 20, 2000 - First Trimester First 3 months Physical milestones

Description:

-Beginning development of spinal cord, nervous system, gastrointestinal system, heart, and lungs- This is a physical milestone. (4 weeks)
-Fetal heartbeat- Physical milestone (8 weeks)

Added to timeline:

Date:

may 20, 2000
Now
~ 25 years ago