It was like an up and down motion , he had the hiccups while doing it also and it's not the same. I'm 37 weeks.
I don't believe babies actually breath whilst they are in the womb, but they do practice the motion of breathing and yes you can see this in a ultrasound as their chest rises and falls!
Their lungs are filled with emniotic fluid and oxygen is delivered to your baby via the umbilical cord, the first proper breath happens when they are born.
I am almost 37weeks are feel hiccups all the time :)
How many weeks are you because im 36 and swear i can also :)