This, to know it exactly, especially ovulation!

If you take a closer look at this diagram, you can see menstruation (winter), rising estrogen (spring), rising FSH+LH/ovulation peak ~48h (summer, maybe fresh and early summer) rising Progesterone welcomes autumn season! https://image.nostr.build/87f9b67de8f32a58df1eba4da026d37353a437e2f0b0392c2167a6787adffb3f.png