I spoke with a few Hatzala Medics.
they claim that it wont work.
A) there is no Halacha problem for a male to deliver a baby.
B) given the intensity and drama of the situation, there is no Hashkafa problem.
C) for the same reason, there are no uncomfortable feelings WHILE the delivery.
now, below are the reasons why it is wrong to have females in hatzala.
A) there will be minling (as is with New Square hatzala a halachic situtaion they have to deal with)
B) the medics and female assistants will be forced to work together in a team.
C) there is the issue of yichud (during the transport and on the way back).
D) as much as ladies will feel uncomfortable that a male member participated in the delivery, ladies will feel more uncomfortable with a female, especially if they are somewhat acquainted and will meet in the future.
yes, it is an embarrassing situation, as is with many other medical emergencies.