Week 13: The baby has now grown to the size of a peach.
Week 14: At this age, the heart pumps several quarts of blood through the body every day. The baby is now the size of a lemon.
Week 15: The baby has an adult’s taste buds. The baby is now the size of an orange.
Month 4: Bone marrow is now beginning to form. The heart is pumping 25 quarts of blood a day. By the end of month 4 the baby will be 8-10 inches in length and will weigh up to half a pound. The baby is now the size of an avocado.