.When a woman's period is 1 week late (3 weeks along), the embryo's heart starts its beating.
.When she is 2 weeks late (4 weeks along), the eyes are beginning to show and the arms and legs are growing. Nerve fibers grow out from the forming brain and spinal cord.
.When she is 3 weeks late (5 weeks along), the nose, eyes, and mouth are much more recognizable now. And the neural tube has now formed the brain.
.By the end of that week (6 weeks along), the fingers are starting to form and the foot is almost finished developing.
.At 7 weeks, fingers have finished forming and toes are not far behind.
.At 8 weeks, everything that will be found in the full grown human being is already a part of the fetus.
.But here's the one that blew me away, at the moment of conception (the sperm meeting the egg), the infant's color of eyes and hair, height, and genetic personality traits are determined (set in their DNA)!!
