A woman experienced a rare occurrence of superfetation, becoming pregnant twice within 28 days and giving birth to two daughters on the same day. Sophie Small, a 30-year-old woman, initially believed that her daughters were twins, like any other mother giving birth to two babies at once. However, the midwives noticed a significant size difference between the infants after their birth. While one daughter weighed 4 pounds and 2 ounces, the other weighed 6 pounds and 1 ounce. Doctors conducted tests and concluded that Sophie had conceived the babies about a month apart due to superfetation.
Superfetation is an extremely rare phenomenon in humans, with only about 10 confirmed cases known. The chances of experiencing superfetation are close to zero, as a pregnant woman's hormonal changes typically prevent further conception while an embryo is growing inside the uterus. Sophie's pregnancy was described as "horrific" due to carrying two babies growing at different stages without her knowledge.