Peak fertility body, ladies, has a softness to it. Think Venus in the “Birth of Venus” painting (the muse of many paintings was a real woman, who was rumored to be so beautiful she was considered the most beautiful in her region and then all of Italy)

Old historical texts describe peak fertility body in many an old passage from the Ottoman Empire, always as being softly rounded in hip and tummy. The Ottoman Empire described the most desirable woman (desired for their beauty Yes, but also fertility in advancing a royal line) as having the round of gut like a “quince” 

Our grandmothers, most of us can remember, are not fragile in frame. And btw, there is nothing wrong at ALL with naturally skinny or thin. But with peak fertility body, there’s a gentle reserve or “softness” That is neither degree of too little or too much. There is a truly nourished quality to the shape, as well as nails, hair, the Shen in the eye (a sparkle)

If you want to see peak fertility body, look up Venus De Milo in her shell or Ottoman Empire or women throughout the Renaissance. Painting often showed ideal not just out of an ideal beauty but because that shape could hold a child and safely birth one.