Pregnancy is one of the common contraindications for extracorporal shock-wave lithotripsy (ESWL) because of the potential risk of the shock waves on the fetus (Chaussy and Fuchs 1989). Smith et al. (1992) reported fetal growth delay in the pregnant rat treated with ESWL. The risk of irradiation when the calculus is located by imaging and premature induction of labor (Vieweg et al. 1992) have also been reported. However, seven patients have undergone this treatment during their pregnancy, either because the pregnancy had not been diagnosed at the time of treatment or after informed consent (Asgari et al. 1999; Frankenschmidt and Sommerkamp 1998). These women continued their pregnancy to term and delivered a perfectly healthy child. Despite these encouraging reports, most learned societies contraindicate ESWL during pregnancy.
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