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:
Confidence votes 1.9K. mg is a milligram, you would measure it on a balance. Either one calibrated in milligrams, or one calibrated in grams that reads to at least three decimal places. most scientific balances measure grams to four or five decimal places, that is 0.0001g, or 0.00001g; which converts to 0.1mg and 0.01mg.