Is it permissible for my fiancée to visit a gynecologist to treat an infection she is suffering from, and for the doctor to examine her private parts to treat her, knowing that the completion of the marriage is contingent upon her visiting the doctor?

If a woman requires medical treatment, she should first seek a treatment that does not necessitate uncovering her 'awrah. If such a treatment is ineffective and her consultation with a physician becomes essential, she should first resort to a trustworthy and specialized female doctor. Otherwise, she may consult a trustworthy and reliable male doctor. It is stipulated that the doctor should only see what is absolutely necessary for the treatment and that he should not be alone with her. Rather, someone who negates seclusion, such as a trustworthy woman or a mahram, must be present with them. As for the fiancé, he is not permitted to be present because he is still a non-mahram.