Overview

Birth, or parturition, is the event when a new baby or young animal enters independent life by emerging from an egg or by delivery from its mother after pregnancy. It is a natural biological process that ends gestation and begins the neonatal period. Some people describe it as the beginning of life, while others treat that phrase in philosophical or religious terms.

Types and characteristics

Animals reproduce in various ways. Oviparous species lay eggs that develop outside the parent's body; many birds, reptiles, and some fish follow this pattern. Viviparous species give birth to live young—most mammals are viviparous. A third strategy, ovoviviparity, combines features: eggs develop inside the parent and hatch internally or immediately after being laid. These patterns describe broad groups across the animal kingdom including many animal species.

Terminology and livestock

Specific terms exist for birth events in different animals: calving refers to cattle giving birth, whelping to carnivores like dogs, and other terms include lambing (sheep) and foaling (horses). In veterinary and agricultural contexts these distinctions guide management practices such as assistance during delivery and neonatal care.

Human birth: stages and care

Human birth generally proceeds in stages: early labor, active labor, delivery of the baby, and delivery of the placenta. Medical care ranges from routine midwifery to obstetric intervention when complications arise. Monitoring during labor and immediate newborn care—warming, clearing airways, and initiating feeding—are central to reducing risks for both mother and child.

Importance and cultural aspects

Birth is significant biologically, legally and culturally. Societies mark it with naming rituals, registration, and varied beliefs about personhood. Public health efforts focus on safe delivery, maternal health, and neonatal survival to lower mortality and improve long-term outcomes.

Common steps in delivery

  • Onset of contractions and cervical dilation
  • Active labor and descent of the fetus
  • Expulsion: delivery of the newborn
  • Afterbirth: expulsion of the placenta and postpartum care

Understanding the biology and social context of birth helps families and professionals prepare for safe deliveries and appropriate newborn care.