The 34-year-old singer, who gave birth to daughter Bluebell Madonna last May, wants another child before it's too late.
A friend of Geri's said: 'She's desperate to have another baby but petrified she won't find the right man to have one with.
'She knows time is running out, so she's not leaving things to chance - she's been looking for a while now and says having a child is the best thing she's ever done.' Geri stopped Bluebell's father, 40-year-old film producer Sacha Gervasi, from seeing his newborn daughter but has since relented.
The singer has previously dated Robbie Williams and British TV presenter Chris Evans.