by | | 1st Trimester
The heart begins to beat just 21 days after fertilization or 5 weeks after the mother’s last menstrual period began. The heart, the size of a poppy seed, is the first organ to function. The first signs of brain development are evident, and the foundation for every...
by | | 1st Trimester
Just 4 weeks after fertilization, the baby is growing rapidly and measures 1/8 of an inch long. The basic structure of the entire central nervous system (brain and spinal cord) has been formed. The eyes are developing, and the arm and leg buds are now visible. The...
