Horse Veterinary Questions? Ask an Equine Vet.
Good Evening, and thank you for the question. Apologies for the delay, I just logged on and saw your post.
If you were able to insert your finger and the pipette through the cervix, there is no reason that any fluid buildup cannot be expelled. Normally, however, if a mare is in heat, the cervix should be relaxed well enough to enter it without substantial difficulty, even if she is maiden. Did you palpate or ultrasound the ovaries to see if she was ovulating, or did you go on clinical signs? Either way, there should be no problems (providing your glove was sterile and you followed sterile technique) if any fluid is produced.
Thanks, ***** ***** let me know if you have any further questions.
-Dan C., DVM.
Just checking to see if you had any further questions!