This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Rhythmicity of serum testosterone in human males. en graph depicting human male testosterone levels as part of study into the effects of abstinence and sexual activity Journals of Zhejiang UniversityScience Ming Jiang Jiang Xin Zhou Qiang Shen Jinwen Zhejiang University Press PMID zju edu cn pdf PDF CMBJ cczero Human