The complete expulsion or extraction from its mother of a product of conception, irrespective of the duration of the pregnancy, which, after such separation, breathes or shows any other evidence of life, such as beating of the heart, pulsation of the umbilical cord or definite movement of voluntary muscles, whether or not the umbilical cord has been cut or the placenta is attached; each product of such a birth is considered live born. It should be noted that this definition includes no requirement that the product of conception be viable or capable of independent life and thus includes very early and patently non-viable fetuses. This has meant that the definition is often not strictly applied and suggests the need for the addition of a viability criteria or the use of a different term (e.g. viable birth) which includes such a criteria.
The birth of a baby which is alive.
Birth of an infant who exhibits any sign of life (e.g., respiration, movement of voluntary muscle, heartbeat), independent of the length of gestation. A live birth may not be viable (capable of surviving.)
An infant showing one of the three evidences of life (breathing, heart action, movements of a voluntary muscle) after complete birth. In some countries a live birth is considered not to have occurred if the infant dies during the 24 hr following delivery. Which of these two definitions is used has considerable effect on various vital statistics concerned with the viability of the fetus at time of delivery.
The birthing of a baby who breathes on their own and possesses a heartbeat. Statisticians might compute the yearly count of live births per 1000 women within the childbearing age range (usually 15 to 44), a parameter known as the fertility rate. This calculation aids them in evaluating the well-being and expansion of a population.