Female Astronauts: Hidden Blood Clot Risk in Space?

New research indicates a potential hidden danger for female astronauts: an increased risk of blood clots during space travel. Scientists from Simon Fraser University conducted a five-day dry immersion experiment, simulating microgravity's effects on 18 healthy women.

The study utilized rotational thromboelastometry to measure blood clotting. Results revealed that while clotting initiation was slower, the resulting clots were faster to form, stronger, and more stable. These clots may also prove more resistant to natural breakdown by the body.

This finding is particularly relevant given that blood shifts towards the head in microgravity, increasing the likelihood of clots in the jugular vein. A previous incident in 2020 involving a clot in a female astronaut's jugular vein aboard the International Space Station underscored this concern.

While not deemed alarming for short missions, the implications for extended journeys, such as those planned under the Artemis Program and future Mars expeditions, are significant. Further comparative studies between male and female clotting responses in microgravity are currently underway to better understand and mitigate these risks.