Baby

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Biography

An infant (from the Latin word infans , meaning "unable to speak" or "speechless") is the very young offspring of a human or other mammal. When applied to humans, the term is usually considered synonymous with baby , but the latter is commonly applied to the young of any animal. When a human child learns to walk, the term toddler may be used instead.

The term infant is typically applied to young children between the ages of 1 month and 12 months; however, definitions vary between birth and 3 years of age. A newborn is an infant who is only hours, days, or up to a few weeks old. In medical contexts, newborn or neonate (from Latin, neonatus , newborn) refers to an infant in the first 28 days after birth; the term applies to Premature birth|premature infants, postmature infants, and full term infants. Before birth, the term fetus is used.

Infant is also a legal term referring to any child under the age of legal adulthood.

Physical characteristics

A newborn's shoulders and hips are wide, the abdomen protrudes slightly, and the arms and legs are relatively long with respect to the rest of their body. In first world nations, the average birth weight of a full-term newborn is approximately 3.2& nbsp;kg.(7 ½ lbs), and is typically in the range of 2.7–4.6& nbsp;kg (5.5& ndash;10 pounds). The average total body length is 35.6–50.8& nbsp;cm (14& ndash;20& nbsp;inches), although premature newborns may be much smaller. The Apgar score is a measure of a newborn's transition from the uterus during the first minutes after birth.

A newborn's head is very large in proportion to the body, and the Human cranium|cranium is enormous relative to his or her face. While the adult human skull is about 1/8 of the total body length, the newborn's is about 1/4. At birth, many regions of the newborn's skull have not yet been converted to bone, leaving "soft spots" known as fontanel s. The two largest are the diamond-shaped anterior fontanel, located at the top front portion of the head, and the smaller triangular-shaped posterior fontanel, which lies at the back of the head. Later in the child's life, these bones will fuse together in a natural process. A protein called Noggin (protein)|noggin is responsible for the delay in an infant's skull fusion.

During childbirth|labour and birth, the infant's skull changes shape to fit through the birth canal , sometimes causing the child to be born with a misshapen or elongated head. It will usually return to normal on its own within a few days or weeks. Special exercises sometimes advised by physician s may assist the process.

Some newborns have a fine, downy body hair called lanugo . It may be particularly noticeable on the back, shoulders, forehead, ears and face of premature infants. Lanugo disappears within a few weeks. Infants may be born with full heads of hair; others, particularly White people|white infants, may have very fine hair or may even be bald. Amongst fair-skinned parents, this fine hair may be blond, even if the parents are not. The scalp may also be temporarily bruise d or swollen, especially in hairless newborns, and the area around the eyes may be puffy.

Newborns' digestive tracts, which of course have never been used prior to birth, are filled with a greenish-black, sticky material called meconium . This has the function of standing in for fecal material and allows the intestines to develop to the point where they can process milk immediately on birth. This material is passed by the child in the first few days.

Immediately after birth, a newborn's skin is often grayish to dusky blue in color. As soon as the newborn begins to breathe, usually within a minute or two, the skin's color reaches its normal tone. Newborns are wet, covered in streaks of blood, and coated with a white substance known as vernix caseosa , which is hypothesised to act as an antibacterial barrier. The newborn may also have Mongolian spot s, various other birthmark s, or peeling skin, particularly on the wrists, hands, ankles, and feet.

A newborn's genitals are enlarged and reddened, with male infants having an unusually large scrotum. The breasts may also be enlarged, even in male infants. This is caused by naturally occurring maternal hormones and is a temporary condition. Females (and even males) may actually discharge milk from their nipples (sometimes called witch's milk ), and/or a bloody or milky-like substance from the vagina. In either case, this is considered normal and will disappear in time.

The umbilical cord of a newborn is bluish-white in color. After birth, the umbilical cord is normally cut, leaving a 1& ndash;2& nbsp;inch stub. The umbilical stub will dry out, shrivel, darken, and spontaneously fall off within about 3 weeks. Occasionally, hospital s may apply triple dye to the umbilical stub to prevent infection , which may temporarily color the stub and surrounding skin purple.

Internal physiological changes at birth

Upon entry into the air-breathing world, without the nutrition and oxygenation via the umbilical cord, the newborn must begin to adjust to life outside the uterus .
Newborns can feel all different sensations, but respond most enthusiastically to soft stroking, cuddling and caressing. Gentle rocking back and forth often calms a crying infant, as do massages and warm baths. Newborns may comfort themselves by sucking their thumb, or a pacifier . The need to suckle is instinctive (see Suction#Suction in biology|suction in biology ) and allows newborns to feed.

Newborn infants have unremarkable vision, being able to focus on objects only about 18& nbsp;inches (45& nbsp;cm) directly in front of their face. While this may not be much, it is all that is needed for the infant to look at the mother’s eyes or areola when breastfeeding . Depth perception does not develop until the infant is mobile. Generally, a newborn cries when wanting to feed. When a newborn is not sleeping, or feeding, or crying, he or she may spend a lot of time staring at various objects. Usually anything that is shiny, has sharp contrasting colors, or has complex patterns will catch an infant's eye. However, the newborn has a preference for looking at other human faces above all else. ( see also: infant metaphysics and infant vision )

In utero, the infant can hear many internal noises, such as the mother's heart sounds|heartbeat , in addition to external noises including the human voice, music and most other sounds. Therefore, though a newborn's ears may have some catarrh and fluid, he or she can hear sound from before birth. Newborns usually respond more readily to a female voice over a male voice. This may explain why people will unknowingly raise the pitch of their voice when talking to newborns (this voice change is called motherese ). The sound of other human voices, especially the mother's, can have a calming or soothing effect on the newborn. Conversely, loud or sudden noises will startle and scare them. Newborns have been shown to prefer sounds that were a regular feature of their prenatal environment, for example, the theme tune of a television programme their mother watched regularly.

Newborns can respond to differing tastes, including sweet, sour, bitter, and salty substances, with a preference toward sweetness. It has been shown that neonates show a preference for the smell of foods that their mother ate regularly.

Care and feeding

Infants cry as a form of basic instinctive communication. A crying infant may be trying to express a variety of feelings including hunger, discomfort, overstimulation, boredom, wanting something, or loneliness.

Breastfeeding is the recommended method of feeding by all major infant health organizations. If breastfeeding is not possible or desired, bottle feeding is done with expressed breast-milk or with infant formula . Infants are born with a sucking reflex allowing them to extract the milk from the nipples of the breasts or the nipple of the baby bottle , as well as an instinctive behavior known as rooting with which they seek out the nipple. Sometimes a wet nurse is hired to feed the infant, although this is rare, especially in developed countries.

Adequate food consumption at an early age is vital for an infant’s development. From birth to four months, infants should consume breast milk or an unmodified milk substitute. As an infant’s diet matures, finger foods may be introduced as well as fruit, vegetables and small amounts of meat.

As infants grow, food supplements are added. Many parents choose commercial, ready-made baby food s to supplement breast milk or formula for the child, while others adapt their usual meals for the dietary needs of their child. Whole cow's milk can be used at one year, but lower-fat milk should not be provided until the child is 2 to 3 years old. Weaning is the process through which breast milk is eliminated from the infant's diet through the introduction of solid foods in exchange for milk. Until they are toilet-trained, infants in industrialized countries wear diapers . Children need more sleep than adults—up to 18 hours for newborn babies, with a declining rate as the child ages. Until babies learn to walk, they are carried in the arms, held in slings or baby carriers, or transported in baby carriages or strollers. Most industrialized countries have laws requiring child safety seat s for babies in motor vehicles.

Infants and the Benefits of Touch

Studies have shown that infants who have been the recipients of positive touch experience more benefits as they develop emotionally and socially. Experiments have done with infants up to four months of age using both positive touch (stroking or cuddling) and negative touch (poking, pinching or tickling). The infants who received the positive touch cried less often and also vocalized and smiled more than the infants who were touched negatively. Infants who were the recipients of negative touching have been linked with emotional and behavioural problems later in life. A lower amount of physical violence in adults has been discovered in cultures with greater levels of positive physical touching. Fields, Tiffany, , “Human Development”, 2002, 45, 100-103

Infant mortality

Infant mortality is the death of an infant in the first year of life, often expressed as the number of deaths per 1000 live births (infant mortality rate). Major causes of infant mortality include dehydration , infection , Congenital disorder|congenital malformation and Sudden infant death syndrome|SIDS .

This epidemiology|epidemiological indicator is recognized as a very important measure of the level of health care in a country because it is directly linked with the health status of infants, children, and pregnant women as well as access to medical care, socioeconomic conditions, and public health practices.

It is shown through data that infant mortality rates continue to be very high in the US compared to infant mortality rates in other countries such as Sweden and Japan. There is a positive relationship between national wealth and good health. The rich and industrialized countries of the world, prominently Canada, the United States, and Japan, spend a large proportion of their wealthy budget on the health care system. As, a result, their health care systems are very sophisticated, with many physicians, nurses, and other health care experts servicing the population. Thus, infant mortality is low. On the other hand, a country such as Mexico, which spends disproportionately less of its budget on healthcare, suffers from high mortality rates. This is because the general population is likely to be less healthy. Infant mortality rates are especially high in minority groups. Non-Hispanic black woman have an infant mortality rate of 13.63 per 1000 live births whereas in non-Hispanic white woman it was much lower at a rate of 5.76 per 1000 live births.
Bridget M. Kuehn, , "JAMA"

Emotional development

Attachment theory is primarily an Adaptation|evolutionary and Ethology|ethological theory whereby the infant or child seeks proximity to a specified attachment figure in situations of alarm or distress for the purpose of survival.Tronick, Morelli, & Ivey, 1992, p.568. "Until recently, scientific accounts ... of the infant's early social experiences converged on the view that the infant progresses from a primary relationship with one individual... to relationships with a growing number of people... This is an epigenetic, hierarchical view of social development. We have labeled this dominant view the continuous care and contact model (CCC...). The CCC model developed from the writings of Spitz..., Bowlby..., and Provence and Lipton... on institutionalized children and is represented in the psychological views of Bowlby.... Common to the different conceptual frameworks is the belief that parenting practices and the infant's capacity for social engagement are biologically based and conform to a prototypical form. Supporters of the CCC model generally recognize that the infant and caregiver are able to adjust to a range of conditions, but they consider the adjustments observed to reflect biological variation. However, more extreme views (e.g., maternal bonding) consider certain variants as nonadaptive and as compromising the child's psychological development. Bowlby's concept of monotropism is an exemplar of the CCC perspective..." (Tronick, Morelli, & Ivey, 1992, p. 568). The forming of attachments is considered to be the foundation of the infant/child's capacity to form and conduct relationships throughout life. Attachment is not the same as love and/or affection although they often go together. Attachment and attachment behavior s tend to develop between the age of 6 months and 3 years. Infants become Attachment in children|attached to adults who are sensitive and responsive in social interaction s with the infant, and who remain as consistent caregivers for some time. Parental responses lead to the development of patterns of attachment which in turn lead to 'internal working models' which will guide the individual's feelings, thoughts, and expectations in later relationships.Bretherton,I. and Munholland,K., A. Internal Working Models in Attachment Relationships: A Construct Revisited. Handbook of Attachment:Theory, Research and Clinical Applications 1999eds Cassidy,J. and Shaver, P., R. Guilford press ISBN 1-57230-087-6 There are a number of Attachment in children|attachment 'styles' namely 'secure', 'anxious-ambivalent', 'anxious-avoidant', (all 'organized') and 'disorganized', some of which are more problematic than others. A lack of attachment or a seriously disrupted capacity for attachment could potentially amount to serious disorders.

Baby and plane travel

Many airlines refuse boarding for all babies aged under 7 days (for domestic flights) or 14 days for international flights. Asiana Airlines allows babies to board international flights at 7 days of age. Garuda Indonesia disallows all babies under the age of 14 days to board any flights.

Delta Airlines and Pinnacle Airlines allow infants to travel when they are less than 7 days old when they present a physician travel approval letter. Comair requires a letter if the infant is 12 days or younger. Skywest will not allow an infant less than 8 days old on board.

Common care issues

Baby colic

Bassinet / infant bed|crib

Bathing

Cradle cap

Day care

Diaper rash

Infant formula

Infant massage

Immunization

Pacifier

Paternal bond

Teething

Umbilical cord

Copyright Citations

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