What happens when FMLA leave is exhausted before the baby is born?

Q: “An employee is expecting a baby, but has had some complications and has been put on bed rest. She is currently on FMLA leave. By the time the baby is born, she will have already used 10 weeks of FMLA. Does the birth start a new FMLA leave cycle or is it a 12-week max within a year regardless of reason(s)?” – Chrissy, Tennessee