From Astroglide to KY, most of the lubricants tested decreased sperm quality by 20 percent or more within 30 minutes. One variety of KY—the “Tingling” type—lowered sperm motility by more than 75 percent, the study shows. The good news: None of the sperm-slowing effects of lubricants persist if you stop using them, the research shows.
While decreased motility doesn’t guarantee you won’t get your partner pregnant, when you drop below 50 percent motility, you’re going to have a tough time, explains Lauren Streicher, M.D., a gynecologist at Northwestern Memorial Hospital and author of the upcoming Love Sex Again, which devotes an entire chapter to lubricants. So if you are trying to conceive, stick with brands like Pre-Seed, which only lowered motility by about 1 percent in the study—an “insignificant” amount, says Dr. Streicher.
And if you’re not looking to make babies, know that Astroglide won’t replace condoms anytime soon. While lubes are hurting your sperm motility, “all it takes is one sperm making it to the egg,” Streicher reiterates. Stick with condoms from proven brands like Durex, Trojan, and Lifestyle—they are still your best safeguard against STDs and unwanted pregnancy, according to a Consumer Reports analysis.
Source: Men’s Health