Singer Madonna is reportedly trying for her fifth baby with boyfriend Jesus Luz.

The 51-year-old already has a daughter Lourdes, 13, whose dad is personal trainer Carlos Leon, son Rocco, nine, with ex-hubby Guy Ritchie, and two adopted children Mercy and David, both four.

Madonna is currently dating Brazilian model Jesus Luz and it is claimed she wants another baby.

A friend, who calls Madonna by her nickname Em, said: "Em says motherhood is her greatest achievement and the most fulfilling thing in her life.

"She knows that, at 51, it's going to be harder to conceive naturally. But she is Olympic-athlete fit and is ready for the challenge."