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:
In comparison, 1 milligram equals 1,000 times 1 microgram. Both units are used in the field of medicine to administer drug dosage. Microgram's symbol is Âµg, but the abbreviation mcg is used in medicine so as to avoid confusion with milligram's symbol (mg). Learn more about Chemical Equations