Even if ovulation normally takes place 14 days before the period, sometimes women ovulate at the same time of the previous period, and for this reason some pregnancies happen while you're on your period.
Bachelor's Degree in Biotechnology from the Pablo de Olavide University (UPO) of Seville, Spain. Master's Degree in Biotechnology of Human Assisted Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI). Experience at IVF, andrology, and general analysis laboratories. Embryologist specialized in Assisted Reproduction.