I'm just saying, consider the risk vs benefit. Of course lead is more dangerous than caffeine. But if it's between getting assaulted, mauled by a wild animal, etc. or possibly harming a fetus with a little lead and sonic pressure, well, i don't think many people would tell her not to shoot in that situation. I just don't want a girl beating herself up over hearing protection later if she feels her life (and her child's) is threatened. Not a likely scenario anyway, but i thought it was worth mentioning. Sometimes message board topics spiral into extreme territory, so i wanted to throw it out there early.
Of course no one is saying for a woman not to defend herself if the situtation calls for it but I took the OPs post to be refering to recreational target shooting. He also posted a pick of an airsoft rifle which IMHO would be fine.