There are many causes of constipation, for example, medications; poor bowel habits; low fiber diets; possibly abuse of laxatives; hormonal disorders; diseases primarily of other parts of the body that also affect the colon; and high levels of estrogen and progesterone during pregnancy.
mg: Abbreviation for milligram, a unit of measurement of mass in the metric system equal to a thousandth of a gram. A gram is equal to the mass of one milliliter, one thousandth of a liter, of water at 4 degrees C. MG (in capital letters) is the abbreviation for the disease myasthenia gravis. Search MedTerms:
1 ng = 10â»â¹ g = 10â»Â¹Â² kg. A milligram (mg) is a decimal fraction of the base unit of mass in the International System of Units (SI) kilogram, which is defined as being equal to the mass of the International Prototype Kilogram, which is almost exactly equal to the mass of one liter of water. 1 mg = 10â»Â³ g = 10â»â¶ kg.