A 39-year-old woman discovered she was pregnant with a baby girl, Rosalie, three weeks after she became pregnant with a boy, Noah. Tests on Rosalie revealed that the woman conceived a second baby three weeks apart when she was already pregnant with another.
This case is considered a phenomenon, called ” superfetation ” which, in turn, has been reported only a few times in medical history, mainly in women who have undergone in vitro fertilization, advances the newspaper The Sun.
According to the same source, it happens when an egg is fertilized by sperm and implants in the uterus just a few days or weeks after another.
These cases are extremely rare because, while a woman is pregnant, her body and her hormones usually prevent another pregnancy from happening.
Rebecca was told that this may have happened due to taking infertility medication, which causes the eggs to release more eggs.
The woman, from England, ended up giving birth to the two babies on the same day, with Rosalie being born smaller than Noah because she was conceived three weeks later.