Madonna, who recently ruled out any chance of marrying boyfriend Jesus Luz, says she can have another child, insisting she would "never say never" to more children.
The signer already has four children -- daughter Lourdes, nine-year-old son Rocco, three-year-old David Banda, and her newly adopted daughter Mercy who is also three.
Madonna is in a steady relationship with Luz, who she has been dating since meeting at a photoshoot for W magazine in December last year, and she admits she wouldn't rule out having another child.
"Who knows? I have my hands full right now, I have no idea! That's all I'm going to say. But we never say never," femalefirst.co.uk quoted her as saying.
She is proud of her daughter Lourdes who is turning 13 Wednesday, for coping well with her three siblings.
"She's super-sister. She's amazing with the little ones. She has the typical relationship with her brother, Rocco. They're like 'I love you I hate you' every five minutes. But with the two little ones, she's great. She's amazing. Very protective," she said.