Hi.
My therapist also suggested that I check hormone levels as well as a genetic karyotype. Like you, I wondered, "What's up with that?" Later, I realized that she is being thorough in making her diagnosis and analysis. Actually, this is excellent professional behavior. She also told me that the standards of care recently changed. Maybe they require these things to be checked. Anyway, just go with the flow. Can't hurt. Good luck.
Hugs.