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  1. Premature birth - Symptoms and causes - Mayo Clinic

    Dec 23, 2025 · A premature birth means a baby is born too early. The birth takes place before the 37th week of pregnancy. A typical pregnancy lasts about 40 weeks. Premature babies often have serious …

  2. Preterm Birth: Premature, Causes, Symptoms & Complications

    Feb 23, 2024 · Premature or preterm babies are babies born before 37 weeks of pregnancy. Premature infants are at a greater risk for health problems.

  3. Premature Birth | Fact Sheets | Yale Medicine

    Premature birth, also known as preterm birth, is when a baby is born earlier than usual, before 37 weeks of pregnancy. Because premature babies are born early, they have not had as much time as usual in …

  4. Prematurity Awareness month - Harvard Health

    Oct 7, 2025 · Every November, we mark Prematurity Awareness Month with information about preventing premature labor and supporting those moms who gave birth prematurely. Some babies …

  5. Preterm Birth | Maternal Infant Health | CDC

    Nov 8, 2024 · Preterm birth is when a baby is born too early, before 37 weeks of pregnancy have been completed. In 2022, preterm birth affected about 1 of every 10 infants born in the United States. The …

  6. Preterm birth - World Health Organization (WHO)

    May 10, 2023 · Preterm is defined as babies born alive before 37 weeks of pregnancy are completed. There are sub-categories of preterm birth, based on gestational age: moderate to late preterm (32 to …

  7. Prematurity - Stanford Medicine Children's Health

    A baby born before 37 weeks of pregnancy is considered premature or born too early. Learn more about prematurity, including causes, risks, symptoms, diagnosis, and treatment.

  8. Premature Babies - MedlinePlus

    Jul 18, 2024 · Almost 1 of every 10 infants born in the United States are premature, or preemies. A premature birth is when a baby is born before 37 completed weeks of pregnancy.

  9. Preemie - HealthyChildren.org

    Preemie Premature birth occurs in about 11 to 13 percent of pregnancies in the US. Almost 60 percent of twins, triplets, and other multiple deliveries result in preterm births. A birth is considered "preterm" …

  10. Premature birth | Definition, Causes, & Health Effects | Britannica

    Mar 1, 2026 · Premature birth, in humans, is any birth that occurs less than 37 weeks after conception. A full-term pregnancy lasts anywhere from 37 to 42 weeks. The worldwide incidence of premature birth …