Twin Heart rate.... Need help 😳

Iya ibeji 😍😍
Had an ultrasound today and they both have HR of 152. 
Twin A sex is XY but Twin B sex is not clear so we Cudnt tell. 
Does this mean they are the same gender? 
I'm currently 21 weeks 1day and won't be having another ultrasound till 30weeks. 
Any suggestions regarding the heart rate