Frequent visits to the sauna may lower men's sperm count, although the effect appears to be temporary, a new study finds.
In the study, healthy Finnish men in their 30s with normal sperm counts spent 15 minutes in a sauna two times a week for three months, after which they stopped visiting the sauna.
The sauna sessions lowered the men's sperm counts, and they remained below normal for three months after the men stopped visiting the sauna, compared with the levels at the study's start. After six months, however, sperm counts returned to normal.
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