20 Celebrities Who've Opened Up About Their Struggles With Infertility

Although the singer was already a mother of two, Gwen Stefani had a difficult time getting pregnant for the third time — what's commonly referred to as secondary infertility. Before conceiving her third son, Apollo, Stefani shared her experience with Marie Claire:

"I really, really, really wanted one about two years ago. And it didn't really work out. So . . . I feel good with what we've got. Everything works out how it should. You can't plan anything, right? You can try."