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, 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, K Y Jelly Warming Personal Lubricant, Stimulating Gel for Sexual Wellness, Vaginal Moisturizer, 5 fl oz Walmart.com KY Lubricating Jelly: Comfort & Intimacy Enhancement Mountainside Medical Amazon.com: K Y Liquid Lube, Personal Lubricant, NEW Water Based Formula, Safe for Anal Use, Safe to Use with Latex Condoms, for Men, Women and Couples, Body Friendly 4.5 FL OZ (2 Pack) : What type of intercourse lubricants are safe to use when planning pregnancy?