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The Apgar score is a quick way for health professionals to evaluate the health of all newborns at 1 and 5 minutes after birth and in response to resuscitation. [1] It was originally developed in 1952 by an anesthesiologist at Columbia University, Virginia Apgar, to address the need for a standardized way to evaluate infants shortly after birth.
Once the fetus is sufficiently developed, chemical signals begin the process of birth, which begins with the fetus being pushed out of the birthing canal. The newborn, which is called an infant in humans, should typically begin respiration on its own shortly after birth. Not long after, the placenta eventually falls off on its own.
Placental expulsion (also called afterbirth) occurs when the placenta comes out of the birth canal after childbirth.The period of time starting just after the baby is expelled until just after the placenta is expelled is called the third stage of labor.
Blood pressure readings should range from 60 to 80 mm Hg systolic and 40–50 mm Hg diastolic. Mean arterial pressure should be the same as the weeks of gestation at birth. Within the first hour after birth, there may be a drop of up to 15 mm Hg in the systolic blood pressure. [1]
Amniotic fluid normally enters the mother’s bloodstream during birth but allergic reactions only occur in 2.5 for every 100,000 births or 1 in 40,000 in the United States.
Gestational age (as well as fertilization age) is sometimes used postnatally (after birth) to estimate various risk factors. For example, it is a better predictor than postnatal age for risk of intraventricular hemorrhage in premature babies treated with extracorporeal membrane oxygenation .
As of 2022, the world record for the lowest gestational age newborn to survive is held by Curtis Zy-Keith Means, who was born on 5 July 2020 in the United States, at 21 weeks and 1 day gestational age, weighing 420 grams. [5] A preterm birth, also known as premature birth, is defined as babies born alive before 37 weeks of pregnancy are ...
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