Preterm birth, also known as premature birth, is the birth of a baby at fewer than 37 weeks gestational age, as opposed to full-term delivery at approximately 40 weeks. [1] .

Feb 23, 2024 · A preterm, premature or “preemie” baby is a baby born too early, or about three weeks before their due date. A full-term pregnancy (fetal development) lasts about 40 weeks.

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 …

Was your baby born more than 3 weeks early? Read on for information from the American Academy of Pediatrics about developmental milestones for your preterm baby. Keep in mind …

How doctors characterize a preemie depends on the week your baby was born and his weight. Learn about the different types of premature babies and survival rates.

May 17, 2024 · When babies are born too soon (premature), parents may worry about how their infant will grow and develop. Premature (“preemie”) babies may differ in their growth and …

Jul 15, 2025 · Let's look at how premature babies develop with each passing week so you can better understand your preemie baby's milestones and health needs at each stage.

About 1 in every 10 infants are born prematurely. Twins and other multiples are more likely to be premature than single birth babies. Many premature babies weigh less than 5 pounds, 8 …

When delivery occurs between 20 and 37 weeks of pregnancy, it's called a preterm birth. A baby born early is called preterm (or premature). Preterm babies are sometimes called "preemies." …

Premature infants, known as preemies and micropreemies, come into the world earlier than full-term babies. Small babies can be preterm, and in some cases, full-term with very low birth …