So I had my first midwife appointment yesterday and heard heart beat for first time and it was 140 exact and I know what they say 140-150 boy 160-170 girl I think I’m havin a boy as my son was 145 but a lot of people are convinced I’m having a girl including expert nub theory pages. I’m only 16weeks so has the heart beat got time to change or can it be a girl with a 140 heart beat.? I’m not finding out gender but this has made me curious (I prefer to have another boy) x