Jason KovacMale Reproductive Medicine and Surgery, Men's Health Center, Indianapolis, Indiana.
- Men's Health Center, Indianapolis, Indiana.
- United States of America
How were the authors able to separate the effects of sleep hours from the day/night changes experienced by shift workers? Was there concern that this could be a confounder? This concept was published in the J. Urol in abstract form (http://www.jurology.com/article/S0022-5347(17)30920-5/pdf) as well as in Fertility Sterility (http://www.fertstert.org/article/S0015-0282(17)31478-4/pdf).
Wondering if the National Survey of Family Growth obtained data regarding sperm counts. This would be helpful to cast light on the association between sperm counts and marijuana use. Other studies have suggest a negative interaction however in the context of this data, it could be tempting to speculate that such a relationship may not be identified (https://academic.oup.com/aje/article/182/6/473/82600).
For readers looking for other biomarkers relating to male fertility the link below will assist.
Interesting commentary and concept. The idea that sperm donor anonymity may be a concept that is rapidly disappearing is something that needs to be considered.