A sperm friendly lubricant should be water based, no glycerine, no Vaseline based, adjunct to the vaginal pH, this is very important. The regular lubricants usually are Vaseline based. But the question Regenesis Fertility Lubricant Products Can we use saliva or any over the counter lubricants when trying to become pregnant???, When youre TTC, regular lubricants can harm sperm movement, so choosing the right one matters., K Y Liquid Water Based Personal Lubricant K Y