2- PRENATAL DEVELOPMENTAL CONCERNS Flashcards
Name 5 determinants of intrauterine growth an birth weight?
- Infant sex
- infant ethnicity
- maternal height
- caloric intake
- cigarettes
- alcohol
- maternal age
- socioeconomic status
an infant at 10 percentile birth weight has what increased the risk of mortality?
- 2.5 times risk
what is considered as a low birth weight?
- > 2500g
What are the two distinct groups of low birth weight and what do they mean?
- Pre term -> meaning physiological immaturity
- small for date -> Displays intrauterine growth retardation and have just comparatively grown less
how does a low birth weight affect post Natal growth?
- Shorter status during childhood and at maturity
- possible deficiencies in neuromuscular coordination and power
what is the most common reason for prenatal loss? what percentage of pregnancies ended in miscarriage? What factors are not proven to cause miscarriage?
- Chromosomal abnormalities
- 10 to 25%
1- sex
2- working outside home
3- moderate exercise
What is the meaning of a congenital malformation?
- an abnormal condition present at birth
which is the most critical with respect to genetic malformations?
- The embryo period because this is when cells differentiate into different types of cells
What are the causal agents of congenital malformations?
- trauma, chemicals or drugs
- radiation, infections or hypoxia
- maternal metabolic imbalances
- maternal substance abuse
What are the three prenatal nutrition factors and what do they relate to?
- PLACENTAL FACTORS: Circulation and transport of nutrients from placenta to fetus
- FETAL FACTORS: the utilization of available nutrients
- MATERNAL FACTORS: mothers overall nutritional status (adequacy of energy and nutrient intake)
What is a teratogen?
- an environmental agent that causes harm to the embryo or fetus
the amount of harm A teratogen can do is a function of what?
- Babies genetic makeup
- amount of exposure
- time and duration of the exposure
in terms of maternal smoking how are the effects on prenatal growth determined and how does smoking impact growth? What deficits in weight and length range from in response to what doses of smoking?
- The effects are determined by the number of cigarettes smoked daily due to the hypoxia caused by the cigarettes
- -70g/0,7cm -> 9 cigarettes daily
- -210g/1cm -> more than 20 cigarettes daily
do the effects of maternal smoking on physical development still impact the baby postnatally?
- yes
What is the prevalence of fetal alcohol syndrome and what percent of children born to alcoholic mothers have at FAS?
- one in every 700 births
- 1/3