C14 Urea is the drug used to do the C14 breath test to check for H. pylori infection. This drug is eliminated about 65% in urine and stool within 24 hours. It takes about 3 months for the complete elimination of the drug if you want it to be completely eliminated in your body. Especially if someone wants to prepare for pregnancy, it must take more than 3 months because if you check after 3 months and then get pregnant, you will not be affected by the radioactivity of C14. This drug is not very harmful to the body, but if you want to get pregnant and want to have a child, it is okay to wait a little longer than 3 months, and none of these drugs will affect the fetus. So, if you want to get pregnant, there is no problem as long as it is longer than 3 months.