The passing of traits from parents to their offspring
Prenatal development
Development of the fetus during pregnancy
Environmentalinfluences
Factors in the environment that can affect prenatal development
Customs surrounding childbirth reflect a culture's beliefs, values, and resources
Birth practices in the Philippines
Placing squash leaves on a woman's abdomen to induce labor
Drinking coconutwater to make for quicklabor
Prior to the 20thcentury, childbirth in Europe and the United States was a female socialritual
Childbirth in those times was "astrugglewithdeath" for both mother and baby
After the turn of the 20th century, childbirth began to be professionalized in the United States, at least in urban settings
Today hospitals are finding ways to humanizechildbirth
Parturition
The act or process of giving birth
Thebirthprocess
1. Uterine, cervical, and other changes
2. Uterine contractions that expel the fetus
A woman may have felt false contractions known as Braxton-Hicks contractions at times during the final months of pregnancy, or even as early as the second trimester
Stages of childbirth
1. Dilation of the cervix
2. Descentandemergence of the baby
3. Expulsion of the placenta
Vaginal delivery
The usual method of childbirth
Cesareandelivery
The delivery of a baby by surgical removal from the uterus
The neonatalperiod, the first 4 weeks of life, is a time of transition from the uterus, where a fetus is supported entirely by the mother, to an independent existence
Newborn appearance
Large head (one-fourth the body length)
Receding chin (which makes it easier to nurse)
Fontanels (where the bones of the skull do not meet)
Newborn body systems
1. Separate circulatory systems and heartbeats during pregnancy
2. Neonate must take over the function of getting oxygen fully after birth
If a neonate does not begin breathing within about 5 minutes, the baby may suffer anoxia or hypoxia, which may cause brain damage
Three to four days after birth, about half of all babies develop neonatal jaundice caused by immaturity of liver and evidenced by yellowish appearance which can cause brain damage if not treated promptly
Apgarscale
Standard measurement of newborn's condition, assessing appearance, pulse, grimace, activity, and respiration
BrazeltonNeonatalBehavioralAssessmentScale (NBAS)
Neurological and behavioral test to measure neonate's responses to the environment
Children who inherit the enzyme disorder phenylketonuria or PKU, will become mentally retarded unless they are fed a special diet beginning in the first 3 to 6 weeks of life
Low-birth-weightbabies
Weight of less 5pounds (2,500 grams) at birth because of prematurity or being small-for-date
Preterm (premature) infants
Infants born before completing the 37th week of gestation
Infants are born around their due dates, but are smaller than would be expected due to inadequate prenatal nutrition
Risk factors for low birth weight
Demographic and socioeconomic factors
Medical factors predating the pregnancy
Prenatal behavioral and environmental factors
Medical conditions associated with the pregnancy
Postmaturity
A fetus not yet born as of 2 weeks after the due date or 42 weeks after the mother's last menstrual period
Stillbirth
Death of a fetus at or after the 20th week of gestation
Infant mortality rate
Proportion of babies born alive who die within the 1st year due to birth defects and genetic abnormalities
Sudden infant death syndrome (SIDS)
Sudden and unexplained death of an apparently healthy infant
About 90 percent of all injury deaths in infancy are due to one of four causes: suffocation, motor vehicle accident, drowning, and residential fires or burns
Children grow faster during the first 3 years, especially during the first few months, than they ever will again
As a baby grows into a toddler, body shape and proportions change
The genes an infant inherits have a strong influence on whether the child will be tall, thin or stocky, or somewhere in between
Teething usually begins around 3 or 4 months, when infants begin grabbing almost everything in sight to put into their mouths, but the first tooth may not actually arrive until something between 5 and 9 months, or even later
Breast-feeding is almost always best for infants and mothers
The AmericanAcademy of Pediatrics (AAP) Section on Breastfeeding (2005) recommends that babies be exclusively breast-fed for 6 months
Breast-feeding is inadvisable if a mother is infected with the acquired immune deficiency syndrome (AIDS) virus or any other infectious illness