12/10/2025
S***m don’t all swim the same — and the uterus can actually tell the difference.
During the fertile window, cervical mucus becomes more selective, creating channels that guide only the healthiest, strongest s***m forward. This natural filtering process helps ensure that the s***m that reach the egg are the most viable.
It’s a fascinating example of how the reproductive system actively participates in conception — not just passively. Have questions? Make an appointment with a provider today.