Fetal development from 1-9 weeks Week 1: This week the “baby” is still in a truly prehistoric state, existing in the form of sperm and egg in the bodies of both spouses. The ovary releases the egg. Week 2: The egg lives in the fallopian tube for 12-36 hours, during which time almost 300 million sperm try to be the lucky one to find and enter the egg. In reality, only a few hundred sperm will reach the egg and only one sperm will eventually break through the barriers to join the egg and form a fertilized egg. This is how the journey of life begins. Week 3: The fertilized egg is laid Week 4: The fertilized egg develops into an embryo Week 5: The heart develops Week 6: The brain develops Week 7: The five senses develop Week 8: Other organs continue to develop Week 9: The baby’s little hands and feet are growing fast: The baby now looks like a little person. His little hands and feet are growing fast, and his fingers and toes are basically developed, but they are all connected. His eyes are still covered by his eyelids and cannot be opened yet, but his nose is taking shape.