my vocalist is a girl. She screams very well and our band is in no bragging terms rather better then most. Well..shes now 4 months pregnant and shes most likely gonna be due in fall of 09.

If anyone is educated enough or could help i was wondering..if until she gives birth
would it be healthy and ok for her to do shows? or for her to scream just in general?

advice is gladly appreciated.
Behringer BG412F 400 Watt Cab

Line 6 Spider III 30 Watt Combo

Rx 60 Ibanez

Bad Dog Wah Pedal

Washburn Bad Dog Chorus Pedal

Boss OD-20 Drive Zone Twin Pedal W/COSM
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This is something she should be asking her doctor.

Not something you should be asking a bunch of teenage boys on a guitar forum.