Baking Soda Gender Test

Carms💜 • 31💜 11 years married💜Boy Mom💜8,7 & 1 year old💜
Has anyone tried this? Either now or previous pregnancies? 
What about the necklace test to predict the sex? I've looked up the Mayan test the Chinese gender calendar.. All that.. Wondering what other mommies have done either now or before and how accurate were there for you all?? 
Hope you guys are having an easy pregnancy!