When a woman gets pregnant, her body starts releasing hormones to sustain the pregnancy and to prevent a new pregnancy from happening. Also, the cervix creates a mucus plug that prevents the passage of sperm. That's why women can't get pregnant while they are pregnant already, except for the rare event of superfetation.
Why can't you get pregnant while pregnant?
By Zaira Salvador B.Sc., M.Sc. (embryologist).
Last Update: 07/13/2018
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)