Correct me if I'm wrong but all over the papers this weekend has been about how Posh and Becks are having another son. She is 13 weeks pregnant. I didn't think you could tell the sex of a baby until at least 16 weeks. I had a scan at 14 weeks and was told they couldn't tell the sex of the baby for another 2 weeks so would be able to find out at my detailed scan at 20 weeks.