Victoria Beckham's house is full of "testosterone".

The 36-year-old fashion designer has again claimed she doesn't know the sex of her unborn baby - her fourth child with her soccer star husband David Beckham - despite reports stating she is having a girl, and admits if she has another son the manly influence in her home will rise again.

Victoria - who has three sons, Brooklyn, 11, Romeo, eight, and Cruz, five, with the handsome sportsman - told talk show host Jimmy Fallon: "The bizarre thing is that the tabloids think they know the sex of the baby before we do. We have no idea, so it's kind of scary, how do they know?

"We don't know, we might find out though, we are excited. It will either be a boy to add to the three boys we have. We will have a five-a-side football team if you add in David. We have so much testosterone in our house it is crazy."

In the past, Victoria has made no secret of her desire to have a daughter, saying she would love someone to do girly things with.

She explained: "I can imagine painting her nails, putting on make-up and choosing clothes with her."