Risks of using saliva as lubricant during sex Buy Preseed Fertility Lubricant in Nigeria Sanlive Pharmacy When trying to conceive, choosing the right lubricant matters. Some common products like oil based lubricants, petroleum jelly, saliva, and regular lubricants may harm sperm and reduce fertility chances. Instead, opt for fertility friendly, The lubricant on your bedside table might be reducing your chances of pregnancy. This is something no one tells you during TTC your lubricant choice matters more than you think.