I feel like once you have had two in a row of the same gender , that's it, they will all be that gender from here on out lol. Though with my last girl her rate rate was 160 at 6 weeks 1 day.... This baby had a heart rate of 94 at 5 weeks 5 days... And then 121 at 7 weeks 1 day.... So I thought... Hmmmm boy??? But then 171 at 8 weeks 1 day...and I was like... Oh, another girl lol!