Victoria and David Beckham are considering having sex standing up - to guarantee they have a baby girl.
Football ace David - who has three sons, Brooklyn, Romeo and Cruz, with his super-slim wife - is reportedly so desperate for a little girl he's started researching ways to dictate a baby's sex.
A source told Britain's Grazia magazine: "David is really keen for Victoria to have another baby. But he wants a girl. And when David wants something, he gets pretty obsessed.
"He's found out through talking to people that you have more chance of conceiving a girl if you do things like have sex standing up on certain days of the month.
"He's even checked out this website that claims to guarantee a couple having a baby girl, and there's a book called 'Determining The Sex Of Your Baby', which is all about whether you can plan to have a boy or a girl."
Victoria has even picked a name for a baby girl - Luna. She revealed: "I love the word Luna. I know it's a girl's name, so maybe for the next baby."
However, it is feared the former Spice Girl could be jeopardising her health if she has another baby. Women like Victoria, who have caesareans, are at greater risk of complications, and the risk is said to increase each time.
A source said: "Victoria knows all this, but she also knows how delighted David would be to have a daughter."