What labs help explain fatigue with heavy periods?

Heavy or prolonged periods can quietly drain iron stores over time, so we often start by checking a complete blood count (CBC) along with iron studies, including ferritin to assess iron storage. These results help us see whether anemia or low iron could be contributing to your exhaustion, even if your hemoglobin isn’t dramatically low.

Depending on your full symptom picture, it can also be reasonable to check thyroid function, vitamin B12, and vitamin D, since abnormalities can overlap with fatigue. If your labs suggest iron deficiency—or if bleeding itself is the driver—improving bleeding control and rebuilding iron stores can make a meaningful difference in how you feel. If fatigue and heavy bleeding persist, reach out to schedule a consultation so our team can evaluate potential underlying causes, including uterine conditions like adenomyosis or endometriosis-related inflammation.