If you don't understand how hormones can affect your moods, then I recommend having a nice chat with a women to learn more. Women go through an entire cycle of hormonal changes every single month, and most women can tell exactly where they are within their cycle based off of their moods. As a women gets closer to menopause, then these hormonal shifts can make some rapid changes to mood, and more.
There seems to be a negative connotations built around women's hormones. When a women is angry, we assume she must be "PMS'ing"; when a women is crying a lot, then she is being "really hormonal". This doesn't open up a very safe space for anyone to talk about what is really going on, and how to lessen the impact that these hormonal changes have on a woman.