Do a quick google search for "female bulk myth" and you will get plenty of results like this:
"Researchers also found that unlike men, women typically don't gain size from strength training, because compared to men, women have 10 to 30 times less of the hormones that cause muscle hypertrophy. "
"Due to the fact that women do not, and cannot, naturally produce as much testosterone (one of the main hormones responsible for increasing muscle size) as males do, it is impossible for a woman to gain huge amounts of muscle mass by merely lifting weights. Unfortunately, the image that may come to your mind is that of professional female bodybuilders. Most of these women, unfortunately, use anabolic steroids (synthetic testosterone) along with other drugs in order to achieve that high degree of muscularity. In addition, most also have good genetics coupled with an unbelievable work ethic that enable them to gain muscle quickly when they spend hours in the gym."
