He said: "Are we done now or will we see any more in the future? We'd like one more.
"We've always said we'd love a big family and five was the number. If we're lucky enough, then we hope to have one more.
"Victoria's doing amazingly well, so we'll see."
The 36-year-old star - who was born in England but now lives in Los Angeles - also reveals his latest addition has her mother Victoria's nose.
He added: "She's a mixture of all three of the boys actually. She's got Victoria's nose thankfully."
David recently revealed he finds it hard to be away from his family playing soccer matches for his team LA Galaxy.
He said: "We have been so lucky with her, and it was hard leaving them all the other day.
"It's always hard leaving my family. Having a two-week-old daughter and leaving her, and leaving the boys and wife Victoria, it was difficult. I can't wait to get back and to hold her and kiss her."
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