I can somewhat see this becoming popular among normal sighted women too for that reason, assuming it’s not cost prohibitive.

an edible device that could detect hCG in saliva. “The premise was that […] if saliva can replace urine as the sample, the whole device can go in the mouth, be used and be consumed,” she explains. Human chorionic gonadotropin, or hCG, is a hormone that is only produced in the body nearly six to ten days after conception. “There’s enough research about how saliva can detect hCG and give you a 96 percent accurate result about whether you’re pregnant or not,” says Rao.