If you want to deliver babies, then you have to be a certified nurse midwife. You can also provide gyn care to women as a CNM, if you work in a place that utilizes CNMs in this capacity. If delivering babies is non-negotiable for you, then you should look into CNM programs, not WHNP pograms.
As I mentioned above, a CNM also can do Women's Health that does not involve pregnancy. The CNMs in my clinic also do routine gyn. It's more about finding a job that allows you to do both. There's really nothing to be gained by getting both certifications, in my opinion. If you want to have a general practice that includes non-gyn health care for women, you might want to look a both an FNP and a CNM certification. Then you could conceivably ( pun intended!) work part time as an FNP in one type of practice (which will most likely involve caring for men and women) and also work part-time as a CNM in another. Keep in mind however, that any CNM position will involve being on call for attending births, which might make it challenging to hold another position.