I was in your wxact same boat dear. I ultimately became a FNP, and Am actually interviewing for an OBGYN position in 2 days. You are wise to understand that a FNP brings you more prospects in the job market, as you can work in many other places including Planned Parenthoods, with cert as FNP. If you know you want nothing else other than womens health positions, maybe go for the WHNP, but if you want some options, do a FNP perhaps. In school you can do an elective clinical and you can get some more womens health exp that way, also working in womens health will always help you. Where are you in your profession? A PA (I've just learned this) can do deliveries and assist in c-sections here in CT, and they can specialize in anyway that they want dependent on what they do in school, so if you want to be more medically and procedurally trained, go for a PA program.
As far as who would get hired; the WHNP or FNP new grads- well i think that would depend on their work experience and personality/exp and level of confidence....
I hope this helps you!