华中科技大学：《营养与食品卫生学》课程教学资源（PPT课件）第三章 特殊人群的营养 Life Cycle Nutrition

不同人群的营养 Life Cycle Nutrition

不同人群的营养 Life Cycle Nutrition

1. Nutrition During Pregnancy The Physiology of Pregnancy A woman’s body undergoes many changes during pregnancy to develop and maintain the systems necessary to support the growing fetus

1. Nutrition During Pregnancy The Physiology of Pregnancy A woman’s body undergoes many changes during pregnancy to develop and maintain the systems necessary to support the growing fetus

◼ Hormones changes ◼ Gastrointestinal changes ◆ Delay in gastric empty ◆ Decreased gastric acidity ◆ Digestive discomforts morning sickness, heart burn ◼ Cardiovascular system ◆ Blood volume increases by 50% ◆ Increase in cardiac output ◆ Decrease in albumin concentration ◼ Renal function changes ◼ weight gain

◼ Hormones changes ◼ Gastrointestinal changes ◆ Delay in gastric empty ◆ Decreased gastric acidity ◆ Digestive discomforts morning sickness, heart burn ◼ Cardiovascular system ◆ Blood volume increases by 50% ◆ Increase in cardiac output ◆ Decrease in albumin concentration ◼ Renal function changes ◼ weight gain

总体重增加: 11~13kg 胎儿: 3.3kg 胎盘、羊水：1.5kg 子宫：1.0kg 血液：1.2kg 乳房：0.4kg 细胞间液：1.5kg 脂肪：2~4kg

总体重增加: 11~13kg 胎儿: 3.3kg 胎盘、羊水：1.5kg 子宫：1.0kg 血液：1.2kg 乳房：0.4kg 细胞间液：1.5kg 脂肪：2~4kg

Recommend Weight Gain During Pregnancy BMI before pregnancy Weight gain Underweight(BMI26.0~29.0) 7.5~11.5 Obesity(BMI>29.0) 6.0~6.8

Recommend Weight Gain During Pregnancy BMI before pregnancy Weight gain Underweight(BMI26.0~29.0) 7.5~11.5 Obesity(BMI>29.0) 6.0~6.8

The nutritional needs of pregnancy During pregnancy, a woman’s nutrient intake and body stores must provide all the nutrients needs to support the growth and development of the baby while continuing to meet the mother’s needs

The nutritional needs of pregnancy During pregnancy, a woman’s nutrient intake and body stores must provide all the nutrients needs to support the growth and development of the baby while continuing to meet the mother’s needs

Energy A typical pregnancy has been estimated to require an additional 55000 kcalories. Additional 200 kcal/day during the second and third trimesters. Protein Protein needs are also increased during pregnancy to provide for RNI: + 5g/d 1st trimester +15g/d 2nd trimester +20g/d 3rd trimester

Energy A typical pregnancy has been estimated to require an additional 55000 kcalories. Additional 200 kcal/day during the second and third trimesters. Protein Protein needs are also increased during pregnancy to provide for RNI: + 5g/d 1st trimester +15g/d 2nd trimester +20g/d 3rd trimester

Minerals Calcium ◆ Pregnant women absorb more of the calcium they consume and lose less calcium in the urine than do nonpregnant women. ◆ The fetus retains about 30 grams of calcium over the course of gestation. Most of the calcium is deposited in the last trimester when the fetal skeleton is growing most rapidly and the teeth are forming. RNI 800mg 1st trimester 1000mg 2nd trimester 1200mg 3rd trimester food source: milk and dairy products

Minerals Calcium ◆ Pregnant women absorb more of the calcium they consume and lose less calcium in the urine than do nonpregnant women. ◆ The fetus retains about 30 grams of calcium over the course of gestation. Most of the calcium is deposited in the last trimester when the fetal skeleton is growing most rapidly and the teeth are forming. RNI 800mg 1st trimester 1000mg 2nd trimester 1200mg 3rd trimester food source: milk and dairy products

Iron Iron deficiency anemia low birth weight preterm delivery Babies born prematurely may not have had time to accumulate sufficient iron, but babies born at term usually have adequate iron even if the mother is deficient. RNI 15mg 1st trimester 25mg 2nd trimester 35mg 3rd trimester food source: red meats, leafy green vegetables, fortified cereals iron supplement

Iron Iron deficiency anemia low birth weight preterm delivery Babies born prematurely may not have had time to accumulate sufficient iron, but babies born at term usually have adequate iron even if the mother is deficient. RNI 15mg 1st trimester 25mg 2nd trimester 35mg 3rd trimester food source: red meats, leafy green vegetables, fortified cereals iron supplement

Zinc Zinc deficiency during pregnancy is associate with an increased risk of fetal malformation and low birth weight. RNI 11.5mg/d 1st trimesrer 16.5mg/d 2nd trimester 16.5mg/d 3nd trimester Iodine Iodine deficiency during pregnancy increases the risk of stillbirth spontaneous abortion and can result in condition in the offspring called cretinism(呆小病）. RNI 200μg/d

Zinc Zinc deficiency during pregnancy is associate with an increased risk of fetal malformation and low birth weight. RNI 11.5mg/d 1st trimesrer 16.5mg/d 2nd trimester 16.5mg/d 3nd trimester Iodine Iodine deficiency during pregnancy increases the risk of stillbirth spontaneous abortion and can result in condition in the offspring called cretinism(呆小病）. RNI 200μg/d