Yes, it is possible in women with shorter cycles or highly irregular cycles. In such cases, unprotected sex during your period could lead to pregnancy.
Read the full article on: What Is Ovulation? – Date, Symptoms & Most Fertile Days ( 56).

Zaira Salvador
B.Sc., M.Sc.
Bachelor's Degree in Biotechnology from the Technical University of Valencia (UPV). Biotechnology Degree from the National University of Ireland en Galway (NUIG) and embryologist specializing in Assisted Reproduction, with a Master's Degree in Biotechnology of Human Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI)
License: 3185-CV