Before revision: In human reproduction, a live birth occurs when a fetus , whatever its gestational age, exits the maternal body and subsequently shows any sign of life , such as voluntary movement, heartbeat, or pulsation of the umbilical cord, for however brief a time and regardless of whether the umbilical cord or placenta are intact.World Health Organization.
After revision: In human reproduction, a live birth occurs when a fetus exits the birthing parent showing any definite sign of life such as voluntary movement, heartbeat, or pulsation of the umbilical cord, for however brief a time and regardless of whether the umbilical cord or placenta are intact.World Health Organization.