Boys apparently have larger, 'blockier' foreheads, while girls' are rounder.
Truth is, unless you ask the sonographer to sex your child at your scan (and it is very unlikely they will be able to tell before your anomaly scan at 18-21 weeks anyway), you've really got no way of knowing for sure until d-day (because even sonographers sometimes get it wrong!
His fascination with exotic-looking young girls continued, and he would scout for suitable models near his studio.
One of these was Monika Pon, who worked at her uncle's launderette, near Tretchikoff's home.
Now, the original painting by Vladimir Tretchikoff, painted in 1951, is to be sold at auction in London.
It is the first time it has come to the market since it was bought by Mignon Buehler, the teenage daughter of a businessman, at an exhibition at Marshall Field's department store in Chicago.