The Spice Girl, who is married to film producer Stephen Belafonte, has been feeling broody since the group's world tour finished and wants to have a child with her spouse.
A source said: "Mel is desperate to have another child. She has been broody since she married Stephen in Las Vegas last June. But she wasn't able to start trying for a baby because of the Spice Girls tour."
Mel already has two daughters, nine-year-old Phoenix Chi with ex-husband Jimmy Gulzar and 11-month-old Angel Iris with Eddie Murphy.
The 32-year-old singer is determined to get pregnant this year.
The source added to Britain's Closer magazine: "She loves Stephen and her career is finally taking off in the States. She feels like it is the right time for a child."