RT @DegenRolf: Men’s levels of sex hormones did in no way adjust to their partner’s cyclical changes in fertility. https://www.sciencedirect.com/science/article/pii/S1743609518310154…
Source date (UTC): 2018-08-08 23:35:24 UTC
Original post: https://twitter.com/i/web/status/1027337512484831232
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