If there are they represent a minute fraction of a percentage and there is no logical reason to introduce huge complications simply to accommodate the desires of the few. The mission of the military isn't simply to offer "career opportunities" to females and there is no "right" to serve.
Frankly, the GOP should be pushing legislation to have women register for selective service ASAP. I think that reality would put the situation into sharp focus for those who think this just boils down to more options for women.
There will never be a female Navy Seal or Army Ranger, UNLESS standards are lowered to they can pass the strength and stamina requirement. Facts are fact. A 13 year old, 120 boy is stronger than the average full grown woman. The boys HS shotput and discuss record is longer than the Women’s Olympic Record. The boys high school 100 yard dash record is faster than the female US Olympic record. Liberals love to ignore reality.