25 week old baby weighing 10oz delivered in Hanover, Germany. She survived against all odds and have been allowed to go home after six months. While not the youngest case recorded, it's the smallest preemie baby I've seen! More here.
It's sad that in many places, Singapore is one of them, the limit for legal abortion is 24 weeks, when it is clearly, obviously, already a baby. (Yeah, it's already a baby since conception, but you can't say that 25-week-old Kimberley Mueller was a blob of tissue.)