Is it true that acute morning sickness means you're going to have a girl?

Is it true that acute morning sickness means you're going to have a girl?

Michele Hakakha (Obstetrician / Gynecologist) gives expert video advice on: Can I figure out if I'm having a boy or a girl by the shape of my belly?; Does being pregnant mean I should 'eat for two'?; If I have heartburn when I'm pregnant, will my baby have lots of hair? and more...

Anecdotally, in my practice it seems to be the case, but there's no evidence. We think that girls may also produce a little more progesterone than boy foetuses, and that can relax the gastrointestinal tract and cause more nausea, vomiting, heartburn and things like that. But no direct link.