Do Lubricants Affect Pregnancy Chances? Many couples wonder if lubricants can prevent conception. Oil based lubricants (like Vaseline, coconut oil, creams, lotions) can slow down sperm movement and reduce pregnancy chances. Best Lubricants for Trying to Conceive Safely Vibrador Con Couples Wearable Vibrator Panty Vibrator With Vibrating Ring, Bluetooth, Rose Red Vibration For Women We Vibe Sync Lite Couples Wearable Vibrator Do not use these items as lubricants': Experts warn against using coconut oil, body lotions, and even saliva during intercourse