Yep, it is true
After stumbling (well after a HI i would) across 4 articles this week about general scientific testing, it appears that the majority of tests carried out are always on male subjects. Even the ubiquitous lab rat is normally male and the crash test dummies - apart from specific testing using children dummies, they are male.
Why males apparently for two reasons.
Firstly things like car crashes, it is mainly men who are likely to be involved in a car car crash so they test the most common likelihood. The consequence being that with the different physics between the genders it could put female passengers and drives at more risks.
The same thing happens apparently in laboratory tests. Unless they are testing for something specific, the majority of lab specimens are male. This is to rule out hormonal / physiological changes due to reproductive cycles. I am assuming that for pharmaceutical final stage studies the tests are gender representative to get approval. However, it does make you wonder how much early research or studies may be skewed by single gender tests.
Until, I read the articles, it hadn't really occurred to me. The big unknown is how far does this stretch and what may have been missed ?