You may not know, as this may have never been discussed, or expected in your family.
Medical profession is geared towards illness, not optimal health, so this is not known or encouraged.
28/29 days between,
Starting when 13/14 yo going till 49/early 50’s
4 – 5 days good bleeding, not debilitating
starting red and stopping red;
no lumps, clots, gushes or pain; no life or body or mood disruptions.
Over life not addressing any and all of these will impact on your life as a woman and mean that allfertility, pregnancy, sexuality and being a woman is difficult.