Gender myths

🌟🌛Tabi🌜🌟

So I am 14 weeks, but I have heard that certain things such as heart rate indicate boy or girl,

under 140 = boy

over 140 = girl

And my last few heart beat measurements, 160 at 8 weeks, 167 at 13. The ob did check gender and she said she didn't see a penis but I don't want to get excited yet.

Has heart beat held true for anyone? Is a lack of penis at 13 weeks an indicator?