Look at the option of having someone dedicated to looking after her during labour so you are able to get her to meet her sibling ASAP after the birth. The carer can remove her from the area if she is distressed or distract her in another part of the room.

DS was 18mo when DD was born. His godmother met us at the hospital and looked after him while waiting for DD to make an appearance but he was there to meet her very soon after birth. I hope we can do the same for this one.