Any guesses? 12w2d ultrasound

Thank you for all the guesses. I had my 20 week scan yesterday and we decided we didn't want to know the sex. I was hoping to have got some good photos to obsess over, but baby was very shy. My husband was convinced baby was a boy from the nub in our 12 week scan, but now he's not sure. I said to the sonographer that I had seen boy bits, to which he replied that a lot of people mistake the umbilical cord for a penis. So, we now haven't got a clue! I have to be re-scanned at 32 weeks due to a low lying placenta so maybe I'll see something then