I know when I first started on my own at my first assignment that it took longer for me to be accepted than my male classmate who came with me. I could see that my coworkers were wondering if I could handle a fight, or a subject who was cussing me out calling me every name in the book, and if I could keep it together when I had a homicide.
It took me showing that I wasn't overly sensitive and that I could be tough in tough situations to get the respect that my classmate achieved simply by walking through the door on that first night of work. I think a large part of the problem here is what we, speaking for myself as well as my male counterparts, think of as feminine.
I will admit, when I think of femininity my first thoughts are of a woman's physical appearance versus a man's. They are stereotypical attributes such as a curvy body, long hair, makeup, jewelry, nail polish, dresses, and un-sensible shoes, to name a few. With a police uniform on we are set to a standard to all look somewhat alike, hence the uniform. It is a model of androgyny.
Nail polish must be natural in color, you can only wear one pair of earrings and they must be studs, and the only ring you can wear is a wedding band. The rest of your uniform consists of black boots for footwear, long pants that are usually black or navy blue and are fit for function, and a vest that flattens out any indication of a female form along with the duty belt that removes the idea that hips once existed there. If you have long hair it must be up in a ponytail or bun so that it does not fall below the collar and if it is short there is a limitation on width and style so that it is subdued and not considered "trendy."
The paramilitary mindset keeps all officers looking the same in order to make police easily identifiable to the public and looking like part of the same team, while keeping the appearance at a professional standard.