Babies legs above head

Does anyone know what it means when their babies legs are stretched above the head? I heard he sonographer mention something about it tends to be a breach position. I have 2 uterus but baby seems to be quite happy and still have room as my uterus has completed stretched now but I wasn’t sure if there was a risk of the baby being breach because of this 🤔 he has long legs growing at 4 weeks ahead according to scan so I’m just not sure if he has room to move them. I’m 30+4 weeks pregnant.