# Menstruation in space will be studied for 1st time with 'Operation Period'

> One new mission is setting out to study menstruation in microgravity for the first time ever. Forty-six years ago, NASA engineers asked Sally Ride if 100 tampons was the right amount to send with her for a six-day…

- **Source:** [Space](https://www.space.com/space-exploration/human-spaceflight/menstruation-in-space-will-be-studied-for-1st-time-with-operation-period?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6a385bbde8976fcb37ce01cd)
- **Published:** 2026-06-21
- **Category:** Science
- **Tags:** #nasa #menstruation #space #operation #period #studied #study #amount
- **Canonical:** http://localhost:4321/a/6a385bbde8976fcb37ce01cd

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_GearOpen's distilled summary. The full original article is published at Space (source link above); GearOpen does not republish the source's full text._