The patient's prolactin levels of 76-80 ng/mL may be artificially low due to the Hook effect; thus, a prolactin with dilution was recommended but not ordered by the care team due to unclear reasons [19]. While her thyroid function initially suggested central hypothyroidism with low thyroid stimulating hormone (TSH) and low total T3, her thyroid axis had normalized within a week. She did have very low estradiol, although she had recently received a medroxyprogesterone injection the previous month. Here, PRL is linked to Central hypothyroidism.