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A newborn is, in colloquial use, a baby who is only hours, days, or weeks old; while in medical contexts, a newborn or neonate (from Latin, neonatus, newborn) is an infant in the first 28 days after birth [2] (the term applies to premature, full term, and postmature infants).
Infants are usually born weighing between 5 pounds 8 ounces (2,500 g) and 8 pounds 13 ounces (4,000 g), but infants born prematurely often weigh less. [ 17 ] Newborns typically lose 7–10% of their birth weight in the first few days, but they usually regain it within two weeks.
Newborn infants do not seem to experience fear or have preferences for contact with any specific people. In the first few months they only experience happiness, sadness, and anger. [ 110 ] [ 111 ] A baby's first smile usually occurs between 6 and 10 weeks, as this usually occurs during social interactions it is called a "social smile". [ 112 ]
Infancy (9 C, 82 P) M. Middle age (3 C, 11 P) O. Old age (16 C, 34 P) Y. ... Pages in category "Human life stages" The following 7 pages are in this category, out of ...
Human embryonic development refers to the development and formation of the human embryo. It is characterised by the process of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, human development entails growth from a one-celled zygote to an adult human being.
Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 36 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus .
Manifestations: When the newborn cries, there is a reversal of blood flow through the foramen ovale which causes the newborn to appear mildly cyanotic in the first few days of life. The heart rate of the newborn should be between 110 and 160 beats per minute and it is common for the heart rate to be irregular in the first few hours following birth.
The next stage is attachment in the making occurring from the first six weeks to six months of the infants life. This stage is when the infant is more aware of a distinct caregiver and will seek comfort and trust in them. Following this stage is the clear-cut attachment stage which begins at six months old in the infant and lasts until they are ...