A friend asked me over dinner how she should start tracking her cycle, and I opened my mouth to answer and realised I was about to overwhelm her. So I stopped. Here is the only thing you have to do to start — and it fits in one sentence.

Human fertility isn’t random—it follows seasonal rhythms. Spring, especially March, is when hormones, ovulation, and libido naturally ramp up. Here’s why your body feels different this time of year, and how to work with—or around—it.