Isn't it more likely that she developed an allergy to the suspension of
the progesterone shots or even the wipes that were used to clean the skin?
I'd find it really hard to believe that any female who can actually bear a
child could be allergic to progesterone.  On the other hand, it is common
to find people who are allergic to the solutions in which drugs are
delivered.  This CAN be tested.

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