My husband and I have 2 little girls and we are expecting our third in August. My doctor told me we could find out the gender next appointment. We have decide to do a gender reveal. Our baby's heart rate is 171 so I was assuming another little girl. I was talking to my friend today and she said her sons heart rate was 167 at 10 weeks. So my question is can you really tell by the heart rate or is it still 50/50 chance?