zevi8
“Alot of things that people believe to be halacha is in fact, superstition. Stepping on a fingernail will cause a woman to miscarry? Umm, yeah. We have to start looking in the torah and forget all this nonsense.”
There is a Gemara that discusses this. the gemara in Moed Katan (18A) says that a miscarriage may occur if a pregnant woman steps on nails.
perhaps you should take your own advice and start looking in the Torah