During the second trimester of pregnancy, several key fetal developments occur:
1. Bones begin to harden: In the second trimester, the fetal skeleton starts to ossify, which means the bones begin to harden and take on a more defined shape. This process is essential for providing support and protection to the developing fetus.
2. The eyes can sense changes in light: By the second trimester, the eyes of the fetus have developed to a point where they can detect changes in light. This development is a significant milestone in the sensory development of the fetus.
3. The heart and circulatory system begin to develop: During the second trimester, the heart of the fetus undergoes further development, and the circulatory system starts to form. This is crucial for ensuring that oxygen and nutrients are efficiently transported to the growing fetus.
These milestones mark an important period in fetal development during the second trimester of pregnancy.
