I’m a woman who has been intermittent fasting, mainly OMAD, for 3 years. It’s fine. I’m not pregnant or lactating (and would not do OMAD if I was). I don’t see anything at all about this lifestyle that should exclude women. I have a desk job and am in my 50s, and have kept 40 lbs off long term this way. It resolved my nighttime indigestion, rheumatoid arthritis, and improved my thyroid function.