Pregnancy Symptoms (cont.)
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A woman in the early stages of pregnancy may feel she has to urinate frequently, especially at nighttime, and she may leak urine with a cough, sneeze, or laugh. The increased desire to urinate may have both physical and hormonal causes. Once the embryo has implanted in the uterus, it begins to produce the hormone known as human chorionic gonadotrophin (hCG), which is believed to stimulate frequent urination. Another cause of frequent urination that develops later is the pressure exerted by the growing uterus on the bladder, but this does not cause frequent urination until the second and third trimesters when the fetus is substantially larger.
Medically Reviewed by a Doctor on 7/17/2013
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