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:
Quick Answer. A milligram, abbreviated as mg, is a metric unit of measure that is equal to 1/1000th (one one thousandth) of a gram, while a microgram, abbreviated mcg, is a metric unit of measure that is equal to 1/1000000th (one one millionth) of a gram. One microgram is equal to 0.0010000 milligrams.