Woman gets pregnant while already being pregnant, gives birth to non-identical twins

In a rare condition, a woman named Rebecca Roberts fell pregnant with her daughter, Rosalie, when she was already pregnant with her son, Noah. As a result, she gave birth to Rosalie and Noah, who are technically twins, but they were conceived three weeks apart. This rare condition is known as superfetation. Superfetation is a rare event when another egg is released and fertilized when someone is already pregnant.