Hi Lily, Congrats for your pregnancy
The urea breath test
is widely used for diagnosis of gastric H Pylori infection
. The ionizing radiation
dose involved in this test is extremely low, much lower than the radiation dose absorbed from natural sources. It is at least a thousand times lower than the amount of fetal radiation considered to be teratogenic (0.31 to 5.6 mrad vs 5000 mrad).
Even in the event of inadvertent exposure during pregnancy,fetal radiation dose is low. Frequent voiding (eg, every 2 hours) can reduce the internal radiation-absorbed dose by 40% to 50%. Further, in your case the exposure has occurred at 4 weeks’ gestation. This is before the most vulnerable period for the teratogenic effects of ionizing radiation, which is 8 to 25 weeks’ gestation.
does not have an harm full effect on fetus. Consult your gynecologist for your routine antenatal check up and for NT scan at 11 - 13+5wks and routine anomaly scan at 20 wks gestation.