As everyone has said on here, KY is a lubricant and not a type of birth control. Before getting pregnant, my husband and I used it since I wasn't producing much lubricant myself and I still fell pregnant.
Ky is not a bc hun it is for lubrication
If you're using one with spermicide it decreases the chance of pregnancy but those aren't even close to being 100% effective at preventing pregnancy and need to be used with a condom or another form of birth control.
KY is a lubricant. It is a sex aid- and has nothing to do with birth control.