Extremely Preterm Birth
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A normal pregnancy lasts about 40 weeks. Babies born before 37 weeks of pregnancy are called “preterm” or “premature.” Babies born before 28 weeks of pregnancy are considered extremely preterm. The earlier a baby is born, the less likely he or she is to survive. Those who do survive often have serious, sometimes long-term, health problems and disabilities.
Gestational age is the “age” of the pregnancy. It often is counted in weeks and days. For example, “24 and 2/7 weeks of pregnancy” refers to 24 weeks and 2 days of pregnancy.
Medical advances have helped some preterm babies survive and overcome health challenges. However, the chances that a baby born extremely early will survive without disability are still small. With very rare exceptions, babies born before 23 weeks of pregnancy do not survive. Although survival rates increase for babies born between 23 weeks and 25 weeks of pregnancy, most survivors face serious, often lifelong disabilities. As gestational age increases, the outlook for preterm babies improves.
Extremely preterm birth usually is managed by a team of specialized health care professionals. In addition to your obstetrician or other pregnancy care professional, the team may include a maternal–fetal medicine (MFM) specialist, a neonatologist, and other pediatric subspecialists. You may be transferred to a hospital that offers specialized care for extremely preterm infants. If time allows, this transfer may take place before delivery. High-level neonatal intensive care units (NICUs) provide care for infants with serious health problems. High-level maternal care facilities manage women with high-risk pregnancies.
You and your health care team will work together to form a plan about the care you and your baby will receive. This involves weighing the risks and benefits of the available treatment options for both you and your baby. Your personal beliefs and values and what your wishes are for your baby also are important in forming the care plan.
It is important to remember that this care plan may change as circumstances change. For instance, care plans may be adjusted after the baby is born when more information is known about the baby’s condition. Care decisions also may change depending on how the baby responds to treatment.
Extremely preterm infants will not survive without resuscitation. Often this means helping the baby breathe by inserting a tube into his or her airway. Steps may be taken to start the baby’s heart. Even with resuscitation efforts, some babies will not survive. Those who do may have severe disabilities. Babies born before 23 weeks of pregnancy typically do not survive even with resuscitation. In some cases, after discussion with the health care team, a family may decide that resuscitation is not the best option for their baby. In situations like this, medical care will focus on keeping the baby warm, comfortable and free from pain.
If resuscitation of the baby is planned or being considered, medications given to the pregnant woman may improve the baby’s chances of survival and reduce the risk of disability. These medications include the following:
Corticosteroids to help the baby’s lungs and other organs mature
Magnesium sulfate to decrease the risk of cerebral palsy
Tocolytic medications to help prolong pregnancy for a few hours or days to give time for the first two drugs to work
Antibiotics to prevent infection
Recommendations for giving these medications are made on a case-by-case basis. For example, corticosteroids are not recommended when delivery is expected at 22 weeks of pregnancy or earlier because they have not been found to be helpful. At 23 weeks of pregnancy, corticosteroids may be considered, but whether they will help is uncertain.
Not necessarily. Some fetuses at risk of extremely preterm birth may not be in a good position in the uterus to allow for a safe vaginal delivery. In these cases, a cesarean birth may be recommended depending on gestational age. Cesarean birth is rarely recommended before 23–24 weeks of pregnancy because it is unlikely to affect the outcome.
Your health care team is trained to give medical guidance and to include your and your family’s wishes and preferences in the decision-making process. Because your culture, values, and religious beliefs are important to consider when making these decisions, you also may want to seek support from family, trusted friends, and clergy. The hospital may offer counseling services and other programs for you and your family.
If you decide to withdraw or withhold life-saving care, measures will be taken to make sure the baby is kept warm and comfortable. You will be able to spend as much time as you want with your baby. Nurses and other staff can help you create keepsakes, such as taking pictures and making footprints. Your health care team will make sure that you get the help and support you need.
Most extremely preterm babies spend months in the hospital. After they are sent home, many will need ongoing, specialized medical care. There are pediatricians who specialize in the care of preterm babies from birth through childhood. Some clinics focus on follow-up care for preterm babies. The doctor will closely watch how your baby grows and check to see if any other problems develop during childhood.
Many agencies provide help for parents caring for preterm babies. It is a good idea to become as informed as you can so you can give your baby the best care. As your child reaches school age, you may need to find a special school or teachers to help with any learning problems.
Antibiotics: Drugs that treat certain types of infections.
Cesarean Birth: Birth of a fetus from the uterus through an incision (cut) made in the woman’s abdomen.
Complications: Diseases or conditions that happen as a result of another disease or condition. An example is pneumonia that occurs as a result of the flu. A complication also can occur as a result of a condition, such as pregnancy. An example of a pregnancy complication is preterm labor.
Corticosteroids: Drugs given for arthritis or other medical conditions. These drugs also are given to help fetal lungs mature before birth.
Gestational Age: How far along a woman is in her pregnancy, usually reported in weeks and days.
Magnesium Sulfate: A drug that may help prevent cerebral palsy when it is given to women in preterm labor who may deliver before 32 weeks of pregnancy.
Maternal–Fetal Medicine (MFM) Specialist: An obstetrician–gynecologist with additional training in caring for women with high-risk pregnancies. Also called a perinatologist.
Neonatal Intensive Care Units (NICUs): Special parts of a hospital in which sick newborns receive medical care.
Neonatologist: A doctor who specializes in the diagnosis and treatment of disorders that affect newborn infants.
Obstetrician: A doctor who cares for women during pregnancy and their labor.
Pediatricians: Doctors who care for infants and children.
Preeclampsia: A disorder that can occur during pregnancy or after childbirth in which there is high blood pressure and other signs of organ injury. These signs include an abnormal amount of protein in the urine, a low number of platelets, abnormal kidney or liver function, pain over the upper abdomen, fluid in the lungs, or a severe headache or changes in vision.
Preterm: Less than 37 weeks of pregnancy.
Resuscitation: Medical procedures that restore life to someone who appears to be dead.
Tocolytic: A drug used to slow contractions of the uterus.
Uterus: A muscular organ in the female pelvis. During pregnancy, this organ holds and nourishes the fetus.
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Published: August 2019
Last reviewed: August 2019
Copyright 2021 by the American College of Obstetricians and Gynecologists. All rights reserved. Read copyright and permissions information.
This information is designed as an educational aid for the public. It offers current information and opinions related to women's health. It is not intended as a statement of the standard of care. It does not explain all of the proper treatments or methods of care. It is not a substitute for the advice of a physician. Read ACOG’s complete disclaimer.
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