I don't know much about the procedure, but Could you be having an allergic reaction to latex gloves or tubing and that causing irritation infection and miscarriage?
I react to plastic and latex to a small degree... not life threatening, but does give me infections and itching so if I need some exame I generally prepare ahead by boosting my immune function with Quercitin and C
B complex
MSM (a type of natural sulfer I get at the healthfood store)
Lemon water
Lots of garlic in food or even just fresh chopped in a spoon of honey.
My thyroid used to react more causing higher fevers, before I tried he zapper treatment...by Hulda Clark .
bananna