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:
The units of measurement mg and ml stand for milligrams and milliliters, respectively. Milligrams measure an object's mass, while milliliters measure the volume of liquids. The prefix milli means a fraction of a thousand, which means milligrams (1/1000 gram) and milliliters (1/1000 liter) measure very small quantities. Continue Reading.