Sperm-friendly lubricant: Fact or fiction

Area of Science:

• Reproductive Science
• Sperm Biology
• Infertility Research

Background:

• Coital lubricants are often used by couples trying to conceive.
• The "sperm-friendly" marketing claims of some lubricants require scientific validation.
• Sperm motility is a critical factor in natural conception.

Purpose of the Study:

• To evaluate the impact of various "sperm-friendly" lubricants on human sperm motility.
• To compare the effects of different lubricants, including natural substances, on sperm function.
• To determine if commercially available lubricants meet their "sperm-friendly" claims.

Main Methods:

• Semen samples from 60 normospermic men were analyzed.
• Sperm motility was assessed after exposure to five lubricants (Optilube®, Pre-Seed®, Yes Baby®, olive oil, egg white) and a control.
• Microscopic examination and World Health Organization (WHO) criteria were used to grade sperm motility at multiple time points (2–72 hours).

Main Results:

• All tested lubricants, except egg white, significantly reduced sperm forward progression compared to controls up to 24 hours.
• Pre-Seed® demonstrated superior sperm forward progression compared to Optilube® and Yes Baby® within the first 24 hours.
• Egg white did not adversely affect sperm motility, unlike other tested lubricants.

Conclusions:

• The "sperm-friendly" claims for tested commercial lubricants are largely unsubstantiated.
• Egg white emerged as a potentially sperm-friendly alternative for couples attempting conception.
• Sperm motility is significantly affected by lubricant choice, highlighting the need for careful selection.