Week 16 of pregnancy signifies a period of significant growth and development for the baby. At this stage, the fetus has grown to about the size of an avocado. Its body is becoming more proportionate, and the limbs are well-defined, allowing for more coordinated movements. The baby’s skeletal system is developing, and the bones are hardening. Facial features continue to mature, with the eyes moving closer together, and the ears shifting to their final position.