I'm going outside today. I'll try to answer later, but in case I forget for a few days, google something like: "Is fasting good for women?" or "Fasting and female hormones", etc. Apparently, fasting can help lose weight, yes, but it can trigger some spikes in cortisol and hormonal changes. I guess because the AFAB bodies are always looking out for "the potential baby" and fasts may trigger some: "beware, you need to be strong for the future baby". Same reason for stronger fat storage (for "the baby"), I think. But I'm not a doctor and I might be ill-informed (badly informed?).