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Human Nutrition Chapter 14 Exam #3
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Undergraduate 1
04/27/2016

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Term
pregnancy duration
Definition
38-42 weeks to deliver full term infant
Term
ovum
Definition
egg cell
Term
zygote
Definition
fertilized ovum- terms for cells as they divide until 14 days
Term
embryo
Definition
term for cells from 14 days to 8 weeks
Term
fetus
Definition
embryo is termed this at 8 weeks through the end of the pregancy
Term
amniotic fluid
Definition
fluid in the placenta surrounding the fetus
Term
umbilical cord
Definition
fetal circulation
Term
supplies nutrients and oxygen from maternal circulation
Definition
what is the role of the placenta?
Term
to get full nutrients from fats, carbs, antioxidant nutrients, B vitamins, zinc, and iron
Definition
What are best practices to improve fertility nutritionally? (what 6 nutrients are especially important?)
Term
-Adipose tissue produces estrogen
-Low body fat decreases fertility in both men and women
-women: lower estrogen production (poverty, eating disorder, excessive exercise; amenorrheic, birthrate declines 50%; BMI above 20 is needed)
-men: decrease sex drive, sperm count
-High body fat decreases fertility in both men and women
-excess body fat decreases fertility-losing 5% to 20% body fat increases conception chance
Definition
how is body fat related to fertility?
Term
tiny cysts that surround the ovaries (a cause of female infertility)
Definition
what is polycystic ovary syndrome?
Term
two hormonal alterations: increased testosterone and increased insulin levels
-all women secrete some testosterone; high levels cause symptoms (excess hair growth on face, acne, and a tendency to deposit fat around waist)
-insulin resistance (body cannot use its insulin well) and chance of type 2 diabetes
Definition
How do hormonal changes involved in Polycystic Ovary Syndrome (PCOS) affect fertility?
Term
folate is important for women and men
-role in DNA synthesis (significant for egg and sperm), metabolism of homocysteine
-natural sources: leafy green vegetables, strawberries, orange juice
-synthetic form: supplement or fortified foods (ready-to-eat breakfast cereals)
Definition
what are the best practices to improve fertility nutritionally regarding folate?
Term
Diets rich in antioxidant nutrients can limit activity of free radicals and damage to DNA and cell membranes:
-Vitamin E, vitamin C, zinc, beta-carotene, some plant pigments linked to improved fertility for both men and women
-brightly colored fruits and vegetables, whole grains, and plant oils, rich sources
Definition
what are the best practices to improve fertility nutritionally regarding antioxidants?
Term
Iron and Zinc linked to fertility
-zinc linked to male fertility: protects sperm from oxidative damage and required for normal sexual maturation
-in women, iron and zinc needed for normal ovulation
Definition
what are the best practices to improve fertility nutritionally regarding 2 certain minerals?
Term
-limit sources of saturated and trans fats
-choose plant oils and fish oils
-women: promotes insulin resistance, impairs ovulation
men: high intakes linked to poor sperm quality
men: omega-3 fatty acids in fish oil, walnuts improve sperm quality
Definition
what are the best practices to improve fertility nutritionally regarding dietary fat?
Term
-avoid alcohol when trying to conceive
-some studies show reduced fertility with higher alcohol consumption
-alcohol decreases level of estrogen, testosterone and can disrupt normal cycles of ovulation and sperm production
Definition
what are the best practices to improve fertility regarding alcohol?
Term
1) adverse reactions to medications
2) high intakes of vitamin A
3) exposure to radiation
4) trauma
5) smoking
6) alcohol abuse
7) use of aspirins and NSAIDs
8) illicit drug use
Definition
what 8 practives (nutrition, social, environmental) or pre-existing health conditions couuld lead to poor pregnancy outcomes?
Term
1) low or high BMI increases risks
2) deficient intake of folate can lead to birth defects (neural tube defects)
3) deficient intake of calcium and iron can increase risks
4) excessive intake of Vitamin A can increase risks of birth defects
Definition
what 4 nutritional practices can lead to poor pregnancy outcomes?
Term
first trimester (there is a rapid increase in cell number and size; half of all pregnancies miscarry during the first trimester)
Definition
in which trimester does the mother's nutritional status and intake have the greatest impact on fetal development?
Term
second trimester
Definition
a nutritional deficiency in this trimester affects the mother's ability to breastfeed
Term
1) FAT
2) CALCIUM
3) IRON (fetus may deplete mother's store of iron if intake is low)
Definition
Which 3 nutrients are transferred to the infant in the 3rd trimester?
Term
mother's physical and emotional health is protected so she can return to pre-pregnancy health
Definition
what is defined as a successful pregnancy for the mother?
Term
1) greater than 37 weeks gestation
2) birth weight greater than 5.5 pounds
3) sufficient lung development also imp.
4) the longer the gestation, the less the health risk
Definition
what is defined as a successful pregnancy for the infant?
Term
less than 5.5 pounds at birth
Definition
what is characterized as low birth weight (LBW) for infants?
Term
born <37 weeks
Definition
what is characterized as a preterm infant?
Term
full-term and preterm infants weighing LESS THAN THE EXPECTED WEIGHT FOR GESTATION; more likely to have medical complications
Definition
what is the definition for "Small for gestational age" (SGA)
Term
1) prenatal care, primary determinant of success
2) untreated health conditions, anemia, AIDS, hypertension, or diabetes must be addressed
3) maternal age
4) closely spaced and multiple births
5) smoking, medication, and drug abuse
6) food safety
7) nutritional status
Definition
what 7 factors plays a role in the success of pregnancy?
Term
Ideal age for pregnancy, between 20 and 35 years
Teen pregnancy increases risk for negative outcomes both mother and child
Definition
how is maternal age related to the outcome of a pregnancy?
Term
siblings born in succession to a mother with less than a year between birth and subsequent conception are more likely to be born with low birth weights than are those farther apart in age
Definition
how is closely spaced and multiple births related to the outcome of a pregnancy?
Term
Found in UNPASTEURIZED MILK, SOFT CHEESES MADE FROM RAW MILK, RAW CABBAGE
Definition
what food expose a risk of listeria monocytogenes?
Term
Recommend PASTEURIZED MILK, THOROUGHLY COOKED MEATS (INCLUDING DELI MEATS), FISH, AND POULTRY
Definition
What are food safety recommendations during pregnancy to reduce risk of Listeria exposure?
Term
1) infants to over/underweight women more likely to have problems
2) Obese women: infants more likely for birth defects, death early in life, obesity in childhood
3) BMI under 18.5: infants more likely low birth weight, premature
-lower nutrients stores, specifically iron
-improve by gaining weight before, during pregnancy
Definition
How does pre-pregnancy BMI affect pregnancy outcome?
Term
1) supports fetal growth
2) supports maternal changes
-to support pregnancy and lactation
Inadequate calories
-can retard fetal growth (especially if <1000 kcal per day)
-higher risk for maternal and fetal death in famine areas)
The poorer the nutritional status of the mother, the poorer the pregnancy outcome
Definition
How does nutrition during pregnancy affect pregnancy outcome?
Term
1st trimester: balanced and adequate diet--no increase in kcal
2nd trimester: 350-450 extra kcal per day
Definition
What are energy demands during pregnancy during the first, second, and third trimesters?
Term
adequate maternal weight gain
Definition
What is the best predictor of pregnancy outcome?
Term
healthy women should get 150 minutes/week of moderate-intensity aerobic activity
Definition
what is the activity recommendation for a healthy woman during pregnancy?
Term
those that inherent risk of falls and abdominal trauma
Especially during 2nd and 3rd trimester: downhill skiing, weightlifting, soccer, basketball, horseback riding, certain calisthenics (deep knee bends), and y contact sports (hockey), and SCUBA diving
Definition
What types of activities should be avoided during pregnancy?
Term
Benefits for Mother:
-prevents excessive weight gain during pregnancy
-improved cardiovascular function
-lower risk for gestational diabetes
-lower risk for gestational hypertension
-reduced bone loss associated with pregnancy
-less edema in the legs and feet
-better sleep
-decreased back pain
-improved satisfaction with body image
Benefits for Baby:
-During Gestation:
-decreased resting heart rate
-healthier placenta
-increased amniotic fluid
-possible improvements in brain development
-larger gestation
-After Gestation:
-lower birth weight
-leaner BMI during childhood
Definition
What are benefits of exercising during pregnancy?
Term
first trimester: 2-4 lb
Second and third trimester: 0.75-1lb weekly weight gain; in all- 25-35 lb weight gain
Definition
what is the optimal weight gain during pregnancy for a woman who begins pregnancy at a healthy BMI during the 3 trimesters?
Term
28 to 40 weight gain
Definition
What is the optimal weight gain during pregnancy for a woman who begins pregnancy at a low (>18.5) BMI?
Term
15 to 25 weight gain
Definition
What is the optimal weight gain during pregnancy for a woman who begins pregnancy at an overweight (25.0-29.9) BMI?
Term
11 to 20 weight gain
Definition
What is the optimal weight gain during pregnancy for a woman who begins pregnancy at an obese (<30.0) BMI?
Term
ADDITIONAL 25G/DAY BEYOND THE 0.8G/KG (many (non-pregnant women already consume recommended amount of protein for pregnancy)
Definition
What is the RDA for Protein during pregnancy?
Term
0.8g/kg
Definition
what is the RDA for protein for non-pregnant women?
Term
175gm/day (130 grams/day for non-pregnant women)
Definition
what is the RDA for carbs during pregnancy?
Term
130g/day
Definition
what is the RDA for carbs for non-pregnant women?
Term
MAINTAIN 20-30% OF TOTAL CALORIES FROM FAT(AVOID LOW FAT DIET)
(20-30% of diet also for non-pregnant women)
Definition
What is the lipid intake recommendation during pregnancy?
Term
20-30% of kcal from fat
Definition
what is the recommended fat intake for non-pregnant women?
Term
RDAs/AIs up 30% for most B vitamins and even greater for vitamin B-6 (45%) and folate (50%)
Vitamin needs increase by 10%; most needs easily met through diet, except for folate (vitamin D intake often insufficient)
Definition
What are the general recommendations for vitamins during pregnancy? Can needs be met by diet mostly?
Term
Vitamin D (RDA=15mcg/day; 600 IU)
-decreased Vitamin D has a risk for rickets, serious complications of pregnancy--higher rates of diabetes and hypertension and Cesarean section; diseases that develop later in childhood or adulthood, such as type 1 diabetes, multiple sclerosis, asthma, schizophrenia, and certain types of cancer are assocated with low vimtain D
Definition
what is the recommendation regarding Vitamin D and why?
Term
folate (600mcg/day) for synthesis of DNA (egg and sperm house genetic material); fetal and maternal growth; increased RBC formation; prevent neural tube defects!
Definition
What is the recommendation regarding folate and why during pregnancy?
Term
IRON (27mg/day)
-increased hemoglobin
-iron stores for fetus (remember when the mother will transfer the iron?)
-many women need a supplement
Definition
what are the recommendations for iron during pregnancy and why?
Term
Higher IRON needs (27mg/day)
Higher FOLATE needs (600mcg/day)
(easier than changing diet (morning sickness too!)
vitamin A
-should NOT EXCEED 3000 ug RAE/day
Definition
For which vitamins is the UL especially important during pregnancy and why?
Term
folate, iron, and vitamin D
Definition
what vitamin and mineral supplements are routinely prescribed for pregnancy?
Term
Active 24 year old, 1st trimester-->2200 kcal/day
active 24 year old, 2+3rd trimester-->2600 kcal/day
Definition
what is a good kcal for an active 24 year old in the all 3 trimesters?
Term
Lacto-ovo or Lacto-vegetarian can usually meet nutritional needs
Vegans:
-requires sufficient protein
-focus on vitamins D, B-6, and B-12; iron, calcium, and zinc
Prenatal supplements may be necessary
Definition
What nutrients are of special concern for a pregnant woman who practices a vegan lifestyle (6 micronutrients and one macronutrient)?
Term
Heartburn
-Hormone relaxes muscles in uterus and intestine
-stomach acid refluxes into esophagus
1) avoid lying down after eating
2) avoid spicy foods
3) check with physician regarding use of antacids (antacids can prevent absorption of some nutrients)
Definition
What diet and lifestyle strategies would you suggest to a pregnant woman who complains of frequent heartburn?
Term
Constipation
-relaxation of the intestinal muscle
-fetus competes with the GI for space
Recommendations:
-regular exercise
-fluid (10 cups/day) and fiber (28gm/day)
Definition
what diet and lifestyle strategies would you suggest to a pregnant woman who complains of frequent constipation?
Term
pregnancy-related nausea
Definition
what is morning sickness?
Term
70-80% will experience morning sickness in the first trimester
may be due to heightened sense of smell
can occur any time of the day
Definition
When do you usually get morning sickness?
Term
1) avoid nauseating foods or smells
2) eat small, frequent bland meals
3) consider changing prenatal supplement
4) megadose of vitamin B-6
Definition
what are 4 ways that you can treat morning sickness?
Term
gestational diabetes
Definition
a high blood glucose concentration that develops during pregnancy and returns to normal after birth; one cause is the placental production of hormones that antagonize the regulation of blood glucose by insulin
Term
routine screening at 24-28 weeks gestation
Definition
when are women screen for gestational diabetes?
Term
hormones synthesized by the placenta decrease action of insulin
Definition
what causes gestational diabetes?
Term
controlling carbs in diet may be recommended
Insulin may be needed in some cases
Definition
how can gestational diabetes be treated?
Term
1) increased birth weight
2) low infant blood glucose after birth
3) trauma
4) malformations
5) usually disappears after birth but is linked to diabetes later in life for mother
Definition
What are complications of unmanaged gestational diabetes?
Term
blood pressure greater than 140/90 mmHg that is first diagnosed after 20 weeks of gestation. This may evolve into preeclampsia or eclampsia
Definition
gestational hypertension (pregnancy-induced hypertension)
Term
1) elevated blood pressure
2) protein in the urine
3) edema
4) change in blood clotting
5)convulsions in 3rd trimester
6) liver and kidney damage, leading to death
Definition
what are complications of Pregnancy-induced hypertension?
Term
AAP and AND recommend breastfeeding exclusively for the first 6 months, with the continued combination of breastfeeding and infant foods (solid food) until 1 year
Definition
What are the AND and AAP recommendations regarding breastfeeding?
Term
Advantages:
For Infant:
-bacteriologically safe
-always fresh and ready to go
-provides antibodies and substances that contribute to maturation of the immune system
-contributes to maturation of GI tract via Lactobacillus bifidus fator
-decreases risk of infections
-reduces risk of food allergies and intolerances
-reduces risk of celiac disease and inflammatory bowel disease
-est. habit of eating in moderation
-contributes to proper development of jaws and teeth for better speech
-may enhance nervous system development and eventual learning ability
-decreases risk of childhood leukemia and lymphoma
For mother:
-contributes to earlier recovery from pregnancy
-decreases risk of several chronic diseases later in life (HPT, CVD, Diabetes
-decreases risk of ovarian and premenopausal breast cancer
-potential for quicker return to prepregnancy weight
-potential for delayed ovulation, thus reducing chances of pregnancy in short term
Definition
what are some advantages of breastfeeding?
Term
-widespread misinformation
-mother needs to return to a job
-embarrassment and modesty
-lack of support
-inexperienced mother
-medical conditions (infant with galactosemia, infant with PKU, mothers on meds., mothers with TB, AIDS, HIV+ and chemotherapy)
Definition
what are barriers to breastfeeding?
Term
1) infant has 6+ wet diapers a day
2) shows normal weight gain
3) passes 1+ stool per day
4) softening of breast tissue
Definition
what are 4 ways a mother can tell if her baby is well-nourished
Term
colostrum
Definition
thick, yellow fluid produced during late pregnancy and few days after birth
Term
contains antibodies, immune-system cells and lactobacillus Bifidus factor; provides protection to infant against infections; facilitates the passage of 1st stool (meconium)
Definition
Why is colostrum important for an infant?
Term
Human milk provides adequate hydration for the baby;
additional fluid are needed when the infant is an a hot climate, diarrhea, or vomiting
Too much water can lead to brain disorders and causes low blood sodium
Definition
Does an infant need additional fluid beyond breastmilk?
Term
Energy RDA is ADDITIONAL 400-500 KCAL/DAY (milk production requires ~800kcal/day but the difference will contribute to mother's gradual weight loss)
Definition
How many extra kcal does a breastfeeding mother need?
Term
Increased need for Vitamina A, E, C, riboflavin, copper, chromium, iodide, manganese, selenium, and zinc- FOLLOW DIET PLAN FOR PREGNANCY
Definition
What diet should a breastfeeding mother follow and why?
Term
1) balanced variety of foods
2) moderate fat intake
3) adequate fluids
4) reduction of milk supply caused by: restricting kcal, ingestion of alcohol, smoking
5) limit high mercury fish and intake of peanutts (allergens)
Definition
What are the 5 general guidelines for nutrition for lactating mother?
Term
folic acid (400mcg/day)
Definition
prevents neural tube defects
Term
iodide
Definition
prevents cretinism (congenital hypothyroidism)
Term
antioxidants
Definition
combats free radicals
Term
Vitamin A
Definition
prevent toxicity of this vitamin to avoid birth defects
Term
Caffeine
Definition
moderate use to avoid decreased iron absorption and harm to fetus
Term
aspartame
Definition
control intake of this
Term
obesity and chronic health conditions
Definition
manage health and pre-existing conditions
Term
alcohol
Definition
avoid to prevent birth defects and fetal alcohol spectrum disorders and Alcohol Related Birth Defects
Term
environmental contaminants
Definition
mercury (avoid swordfish, shark, kind mackerel, and tile fish and consume < 6oz tune per week)
Term
fetal alcohol syndrome
Definition
large amounts of alcohol during pregnancy; excess of this reaches the embryo/fetus and it cannot metabolize this; results in poor fetal and infant growth; physical deformities, mental retardation, and irritability and hyperactivity
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