The energy needs of pregnant depends on your constitution, nutritional status, whether or not you have the ideal weight and the frequency with which physically exercise.
Women with pre-pregnancy weight inferior to the ideal should increase their caloric intake by 300-400 kcal / day . Those whose previous weight is coincident with the ideal should supplement their diet by 200 kcal / day.
Finally, women with previous weight than ideal, should do so with 100 kcal / day. During pregnancy you need to ingest more protein to meet the needs of the growing fetus, placenta and maternal tissues.
It is estimated that the proteins in these tissues deposited amounts of less than 925 gr. 70% protein diet they become tissue. Therefore, pregnant women need an additional intake of 10 gr. protein / day. An intake of 70 g. of protein a day is more than enough to meet protein needs.
In the energy needs of pregnant, fatty acids are essential to the fetus. The supply of essential fatty acids in the diet in adequate quantities is essential for the development of the placenta and fetus.
A minimum delivery of 3% of energy as linoleic acid and 0.5% as alpha-linolenic ensure proper development of the fetus and maternal tissues during pregnancy. In addition, other fatty acids are essential for the development of the vessels of the placenta, which is essential for the fetus reaches the appropriate weight.
Following the energy needs of pregnant and focusing on minerals, we must speak first calcium. Calcium metabolism is profoundly alters during gestation by hormonal changes that cause an increase in the absorption and retention of the mineral.
Alterations are also caused by the elevated blood concentrations of a constituent of vitamin D. The fetus 330 grams of calcium accumulated during formation, so that the calcium from the mother is reduced by 5%, which is recovered quickly after childbirth.
The recommended calcium intake for pregnant women is 1200 mg / day, representing an increase of 400 mg. on the normal intake of a woman over 25 years. A low intake during pregnancy leads to a reduction of ore deposits in the mother.
We will consider between energy requirements of pregnant magnesium. The adult body contains about 350 mg. of magnesium per kg. bodyweight. the 60% is in the skeleton, 20% in skeletal muscle and 20% in other tissues.
Young women doing diets without medical supervision have deficits of magnesium, which can trigger hypertension and increased risk of blood pressure elevated in pregnant women.
Therefore, it is recommended that during pregnancy magnesium intake of at least 320 mg / day is assured. This will get the adequate levels of this mineral to prevent the emergence of problems in the gestation period.