My first born is a thumb sucker. She didn't start until she was about 4mos old. I got my first ultrasound today with my second, & that thumb is ALREADY being put to work. Also, the heart rate was 129, which with my daughter it was always 140-160 range, & never lower so I just have a feeling this is a boy. (hoping) Due date of September 29th 2018. :) I have fallen in love. Almost didn't seem real until I seen the baby with it's little heart beat bouncing around. I can't wait to meet him/her & see how my daughter is going to be as a big sister.