Q: I would like to find out, if a women can perform her qurbani, slaughter her sheep while experiencing her monthly period.

A: This is permissible. (Fataawa Mahmoodiyyah Vol. 26 Pg. 182)
And Allah Ta'ala Knows Best

Shafiq Jakhura (Mufti)                  M.D. Mangera (Mufti)                                  
Fatwa Dept.                                     Fatwa Dept.