Andrew Huberman· PhD
1, they're actually called twitchers. Twitchers are sperm that sort of just twitch in place but don't undergo forward progression. 2 is somewhere in between 1 and 3, not surprisingly.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
1, they're actually called twitchers. Twitchers are sperm that sort of just twitch in place but don't undergo forward progression. 2 is somewhere in between 1 and 3, not surprisingly.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
In fact, sperm motility is scored along a scale of 0, 1, 2, or 3, 3 being the best, fast forward progressing. 0 is not moving at all.