Honestly, it's fun to check pero hindi talaga accurate based on science, it's more of a cultural thing na nakakaalibi lang habang naghihintay ng ultrasound haha! A few of us moms tried it before and half ng predictions namin ay tama, half ay hindi, so it's really just 50-50 like guessing talaga. The most reliable way pa rin is the anatomy scan with your OB around 18-20 weeks, pero go ahead and check kung gusto mo, wala naman siyang harm at nakakatuwa pa makita kung tama o hindi in the end!