Did you know that many clinical trials of drugs and medical devices deliberately exclude female subjects? Scientists have traditionally preferred male subjects because they believe that female hormonal cycles might cause variability and skewed results. Of course, the deeply flawed logic of this thinking should be obvious – if hormonal fluctuations affect results, then results are not skewed but in fact may indicate a key gender difference. But nothing has been done about this bias until recently. The latest good news is that the NIH is now starting to require the use of female subjects in trials. See the details here.