The occasional use of Kefir by pregnant women has no effect on the fetus. Because the main ingredient of Keserol is glycerin, mainly using the high permeability of glycerin to soften the feces, and at the same time can promote intestinal peristalsis, the medication will not enter the bloodstream, and will not pass through the placental barrier, so the reasonable use of it will not affect the fetus. However, during pregnancy it is best not to use Kaixel too frequently, because the use of too many times, may lead to dependence on defecation, and constipation may become more serious after stopping the use of the drug, which may lead to the probability of contractions in the middle and late stages of the uterus to increase.