AGRIS

Data provider:

Icon data provider

The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

Статья в журнале

Calcium during pregnancy  [1986]

Villar, J.; Belizan, J.M.;

Доступ к полному тексту

  • NOT AVAILABLE
Extract: During pregnancy calcium requirements increase principally as a result of high calcium accretion in the fetus (30 gm). To afford this requirement intestinal absorption of calcium increases, while renal resorption decreases as calcium in maternal bone tends to be preserved. Therefore a slight decline in serum ionic calcium and a rise in parathyroid hormone (PTH) levels are seen. The increase of PTH levels during pregnancy may depend on calcium intake. Several studies have shown an inverse relationship between calcium intake and blood pressure in pregnant and nonpregnant animals as well as in humans. Also, calcium intake seems to be lower in hypertensive pregnant and nonpregnant subjects. The mechanism of this association is not fully understood. It is hypothesized that a rise in PTH could be associated with an increase in free calcium in cell cytosol. This Ca++ intracellular increase can be related to hypertonicity of muscular arteriolar cells.(author)

Доступ к полному тексту

  • NOT AVAILABLE
Loading...

Библиографическая информация

Язык:
English
Тип:
Journal Article
В АГРИСе с:
1988
Том:
5
Выпуск:
2
Стартовая страница:
55
Конечная страница:
62
Все названия:
" Calcium during pregnancy "
Другое:
" ill., charts. 71 ref. Literature review "

Журнал

Clinical nutrition (USA)

ISSN : 0733-2327