The end of your pregnancy is near! By now, you're likely eager to meet your baby face to face. But there's still a lot happening to the baby, called a fetus, during the last weeks of pregnancy. Use this information to follow along with what's going on during the third trimester week by week.

As you track your pregnancy, remember that to find your estimated due date, your healthcare professional counts ahead 40 weeks from the start of your last period. That means you're actually not pregnant the first week or two of what's counted as your pregnancy's 40-week timeline.

Twenty-eight weeks into pregnancy, or 26 weeks after conception, your baby's eyelids can partially open. The central nervous system can control body temperature. It also can trigger breathing movements, which can be seen on an ultrasound.

By now, your baby might be nearly 10 inches (250 millimeters) long from the top of the head to the bottom of the tailbone, called crown to rump, and weigh about 2 1/4 pounds (1,000 grams).

Thirty weeks into pregnancy, or 28 weeks after conception, your baby's eyes can open wide. Your baby might have a good head of hair by this week. Red blood cells form in the bone marrow.

By now, your baby might be more than 10 1/2 inches (270 millimeters) long from crown to rump and weigh nearly 3 pounds (1,300 grams).

Thirty-one weeks into pregnancy, or 29 weeks after conception, your baby has finished most major development. Now it's time to gain weight quickly.

Thirty-two weeks into your pregnancy, or 30 weeks after conception, your baby's toenails are visible.

The layer of soft, downy hair that has covered your baby's skin for the past few months, called lanugo, starts to fall off.

By now, your baby might be 11 inches (280 millimeters) long from crown to rump and weigh about 3 3/4 pounds (1,700 grams).

Thirty-four weeks into your pregnancy, or 32 weeks after conception, your baby's fingernails have reached the fingertips.

By now, your baby might be nearly 12 inches (300 millimeters) long from crown to rump and weigh more than 4 1/2 pounds (2,100 grams).

Thirty-five weeks into pregnancy, or 33 weeks after conception, your baby fills most of the space in the amniotic sac and has less room to move. But you'll probably still feel lots of stretches, rolls and wiggles.

Thirty-six weeks into pregnancy, or 34 weeks after conception, your baby's skin is becoming smooth as more fat is added under the skin. The limbs start to look chubby.

Most babies have turned head down by this point. If your baby isn't head down, your healthcare professional may talk with you about ways to move the baby in that direction. That's usually done around week 37.

Thirty-seven weeks into your pregnancy, or 35 weeks after conception, your baby can grasp things firmly.

To get ready for birth, your baby's head might start going down into your pelvis. At this point, your baby is considered early term.

Thirty-eight weeks into pregnancy, or 36 weeks after conception, the measurement around your baby's head and around the belly are about the same.

Your baby's toenails have reached the tips of the toes. At this point, most of the lanugo is gone.

By now, your baby might weigh about 6 1/2 pounds (2,900 grams). But size varies quite a bit. Some babies may weigh nearly 9 pounds (4,000 grams) or more by this point in pregnancy.

Twenty-eight weeks into your pregnancy, or 26 weeks after conception, your baby's eyelids can partially open and eyelashes have formed. The central nervous system can direct rhythmic breathing movements and control body temperature.

By now your baby might be nearly 10 inches (250 millimeters) long from crown to rump and weigh nearly 2 1/4 pounds (1,000 grams).

Thirty weeks into your pregnancy, or 28 weeks after conception, your baby's eyes can open wide. Your baby might have a good head of hair by this week. Red blood cells are forming in your baby's bone marrow.

By now your baby might be more than 10 1/2 inches (270 millimeters) long from crown to rump and weigh nearly 3 pounds (1,300 grams).

Thirty-one weeks into your pregnancy, or 29 weeks after conception, your baby has finished most of his or her major development. Now it's time to gain weight — quickly.

Thirty-two weeks into your pregnancy, or 30 weeks after conception, your baby's toenails are visible.

The layer of soft, downy hair that has covered your baby's skin for the past few months (lanugo) starts to fall off this week.

By now your baby might be 11 inches (280 millimeters) long from crown to rump and weigh 3 3/4 pounds (1,700 grams).

Thirty-four weeks into your pregnancy, or 32 weeks after conception, your baby's fingernails have reached his or her fingertips.

By now your baby might be nearly 12 inches (300 millimeters) long from crown to rump and weigh more than 4 1/2 pounds (2,100 grams).

Thirty-five weeks into your pregnancy, or 33 weeks after conception, your baby's skin is becoming smooth. His or her limbs have a chubby appearance.

Thirty-six weeks into your pregnancy, or 34 weeks after conception, the crowded conditions inside your uterus might make it harder for your baby to give you a punch. However, you'll probably still feel lots of stretches, rolls and wiggles.

Thirty-seven weeks into your pregnancy, or 35 weeks after conception, your baby has a firm grasp.

To prepare for birth, your baby's head might start descending into your pelvis. If your baby isn't head down, your health care provider will talk to you about ways to deal with this issue.

Thirty-eight weeks into your pregnancy, or 36 weeks after conception, the circumference of your baby's head and abdomen are about the same.

Your baby's toenails have reached the tips of his or her toes. Your baby has mostly shed all of his or her lanugo.

By now your baby might weigh about 6 1/2 pounds (2,900 grams).

Thirty-nine weeks into your pregnancy, or 37 weeks after conception, your baby's chest is becoming more prominent. For boys, the testes continue to descend into the scrotum. Fat is being added all over your baby's body to keep him or her warm after birth.