Riders in that aggressive position are likely to need more soft tissue relief, in the shape of a cut out or relief channel.
For a lot of women, finding the right cut-out or relief channel can present problems - as discussed, vulvas vary dramatically, and so the perfect shape, depth and size of gap will be individual. Getting it right comes down a lot to testing saddles, and visually comparing those that work, and those that don't.
Some women find they sink in to a cut-out, resulting in what is affectionately called 'flapmash', something Specialized has looked to combat with its MIMIC technology. However, the shallow recess won't suit all.
Those riding time trials will need even more pressure relief at the front, Burt recommends models like the ISM split nose design and short nose saddles.