This woman was the mother of ten children besides the product of this conception, and at the latter occurrence had entire absence of pains and a very easy parturition.
Pincott had a case with an interval of seven weeks between the births; Vale 1 of two months; Bush 1 of seventeen days; and Burke 1 with an interval of two months.

Douglas cites an instance of twins being born four days apart.

Bessems of Antwerp, in 1866, mentions a woman with a bicornate uterus who bore two twins at fifty-four days' interval..