Month 1: brain and spinal cord has begun to form, major organs begun to form, heart begins to beat, umbilical cord is visible, arms and legs begin to develop
Month 2: Baby can make a fist, external sex organs show if your baby is a boy or girl, eyelids close to protect the developing eyes, they will not open again until week 28.
Month 5: Baby can now kick, baby is covered by fine, feathery hair called lanugo and a waxy protective coating called vernix, eyebrows, eyelashes, fingernails, and toenails have formed, baby can hear and swallow.
Month 6: baby's fingers and toes are visible, baby may respond to sounds by moving or increasing pulse