This week's facts pertain to baby development stages:
Seven Weeks: By seven weeks, the baby has grown into an embryo about the size of a raspberry and has a tiny beating heart. The baby will be growing very fast in the next few weeks.
Two Months: The baby is now about the size of a kidney bean and is constantly moving and shifting. The baby has distinct, slightly webbed fingers.
Three Months: By now the baby is about 2 inches long -- the size of a lime. His skin is still transparent, but his face is beginning to look more human.
Four Months: The baby is now about 4½ inches long -- the size of an avocado. The heart is pumping about 25 quarts of blood each day and the baby's body is covered with a layer of downy hair called lanugo.
Five Months: A protective substance called vernix caseosa now coats your baby's skin. Baby's are about 10 inches long from head to heel (at 20 weeks measured from head to foot instead of head to bottom).
Six months: The baby is nearly a foot long now and weighs more than a pound. The red, translucent skin is wrinkled and the lips, eyebrows, and eyelids are distinct.
Seven Months: By now, the baby weighs about 2¼ pounds and is nearly 15 inches long. The body fat is beginning to form in preparation for life outside the womb.
Eight Months: The baby may have hair or peach fuzz on the head now.The baby is probably turned head-down in preparation for birth. The baby may weigh almost 4 pounds.
Nine Months: At nine months, the average baby is more than 18 inches long and nearly 6 pounds, but babies vary widely in size at this point.
