Sultan Moulay Ismaïl of Morocco, "The Bloodthirsty," reputedly sired hundreds of children and perhaps more than a 1,000. Now computer simulations suggest this could have been possible if the ruler had sex about once a day for 32 years.

Ismaïl, who reigned from 1672 to 1727, was the first great sultan of the Moroccan Alaouite dynasty, the current royal house of the kingdom. He was Sharifian — that is, he claimed descent from Muhammad, the founder of Islam....

Some researchers claimed it was unlikely Ismaïl could have fathered that many offspring, noting that women are only fertile for a small window each month, that sperm usually do not fertilize eggs, and that infertility often afflicts women, especially in the developing world. However, other scientists argued women are more fertile than those doubting Ismaïl had said.

To solve this question, scientists developed computer simulations to see how many times Ismaïl had to have sex each day to have 1,171 children in 32 years. They found the sultan could have set this record....