Hi See the attached file

http://www.who.int/nutrition/publications/guidelines/sodium_intake_printversion.pdf

DEAR Batsaikhan Enkhtungalag

The following information shall be useful to you.

Sodium Recommendations

Blood volume increases during pregnancy. Salt is needed for healthy cell functioning because it maintains fluid volume outside your cells. The Institute of Medicine has set the adequate intake of sodium at 1.5 grams per day during pregnancy, which is the same for non-pregnant adults. This equates to 3.8 grams of table salt per day, as table salt is about 40 percent sodium. The tolerable upper intake limit of sodium is 2.3 grams per day, or 5.8 grams of salt.

High Blood Pressure

If you have chronic high blood pressure you should be cautious of how much salt you’re eating, advises registered dietitian Amanda Leonard on the BabyCenter website. You can be diagnosed with chronic hypertension before you become pregnant or before your 20th week of pregnancy. With high blood pressure, less blood, oxygen and nutrients are getting delivered to your baby, putting you at risk for a host of pregnancy complications. Chronic hypertension during pregnancy is managed through medication, additional monitoring of you and your baby, and lifestyle changes, including cutting back on your salt intake.

Preeclampsia

If you develop high blood pressure after your 20th week of pregnancy, and there's protein in your urine, you have preeclampsia. Symptoms of preeclampsia are swelling of your hands and face and sudden weight gain. The exact cause of this condition is unknown, but your diet may be a contributing factor. The only way to treat preeclampsia is by delivering your baby. If you are not far enough along yet, your doctor will probably recommend you reduce your sodium intake. If you already have high blood pressure and aren't cautious about your salt intake, you can developed superimposed preeclampsia, putting you and your baby at even greater risk of complications.

Calcium Excretion

If you’re pregnant, it is critical you get enough calcium. Your baby needs calcium to develop properly. If you aren’t getting enough of this nutrient, your body will pull calcium from your bones to ensure your baby’s development. This puts you at risk for decreased bone mass and osteoporosis later in life. According to the Linus Pauling Institute at Oregon State University, a high salt diet causes you to lose calcium in your urine, taking this vital nutrient away from you and your baby.

The following paper also has some good information.

Circ J. 2016 Sep 23;80(10):2165-72. doi: 10.1253/circj.CJ-16-0405. Epub 2016 Aug 29.

Salt Intake, Home Blood Pressure, and Perinatal Outcome in Pregnant Women.

Inoue M1, Tsuchihashi T, Hasuo Y, Ogawa M, Tominaga M, Arakawa K, Oishi E, Sakata S, Ohtsubo T, Matsumura K, Kitazono T.

Author information

Abstract

BACKGROUND:

The relationship between salt (sodium chloride) intake and pregnancy-induced hypertension (PIH) remains unclear. The aim of this study was therefore to investigate the current status of salt intake during pregnancy and identify effective predictors for PIH.

METHODS AND RESULTS:

Participants were 184 pregnant women who collected 24-h home urine as well as early morning urine samples. We investigated urinary salt excretion, home blood pressure (HBP) measurements for 7 consecutive days before the 20th and after the 30th gestational week, and the development of PIH. Urinary salt excretion according to early morning urine before the 20th gestational week was 8.6±1.7 g/day, and was significantly correlated with that measured from 24-h collected urine. Early morning urine estimated urinary salt excretion was slightly but significantly increased during pregnancy. HBP was 102±10/63±8 mmHg before the 20th gestational week and 104±12/64±10 mmHg after the 30th gestational week. On multiple regression analysis, serum uric acid and body mass index, but not urinary salt excretion, contributed to HBP both before the 20th and after the 30th gestational week. Fourteen participants (7.6%) developed PIH. On multivariate analysis, higher HBP and older age, but not urinary salt excretion, were significantly associated with PIH.

CONCLUSIONS:

Higher HBP and older age, but not urinary salt excretion, are predictors of PIH. (Circ J 2016; 80: 2165-2172).

Proper Salt Intake During Pregnancy

Dear Kulvir Singh,

Thank you very much for sharing your experience. We collected casual spot urine samples from pregnant women's and determined sodium, creatinin and potassium.

Many thanks again.