Oestrus

text 196 words : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2394562/ : Human oestrus

fig : https://www.researchgate.net/figure/The-human-menstrual-cycle-and-rat-estrous-cycle-The-human-menstrual-cycle-left-occurs_fig2_341520054

Testoterone

video 12'12 : https://youtu.be/cX0MNCQvBt8?si=8x4J-rCAoC7nKkCU Millions of men are currently taking testosterone supplements, more than ever in history. Why is this happening? What does it do to your body, and why could it be dangerous?