I think the 'boy' one is a swollen labia. I think girl
That's the other thing I thought too..... Baby is pretty tiny at 15 weeks, so I'm assuming their bits are even tinier....so swollen girly bits are definately possible. Only a week to go till we find out for sure. Unless she's feeling super cheeky and doesn't want to show for the ultrasound..... I'm hoping we are team pink....I've been going through all my daughters old baby things getting very excited