title: Subclinical hyperthyroidism as a potential factor for dysfunctional uterine bleeding.
abstract: OBJECTIVE
  To evaluate the functional status of the thyroid gland in apparently euthyroid women with dysfunctional uterine bleeding.
  
  
  METHODS
  Forty apparently euthyroid women with menorrhagia and no pathologic lesion in the genital tract were compared with 20 women having normal menstrual cycles as controls. All women underwent hormonal evaluation: serum total and free triiodothyronine (T3), thyroxine (T4), thyroid-stimulating hormone (TSH) and serum prolactin.
  
  
  RESULTS
  Statistically significant differences were observed in the values of TSH, total T3, free T3, free T4 and total T4 between the menorrhagia and the control group. Prolactin was increased significantly in the menorrhagia group.
  
  
  CONCLUSIONS
  Subclinical hyperthyroidism can be a potential risk factor for dysfunctional uterine bleeding. Other studies are needed to confirm our findings.
authors: Department of Obstetrics and Gynecology, Department of Chemical Pathology, Cairo University, Cairo, Egypt.
authors: Abdel Hamid
authors: AH
authors: Attia
authors: Dalia
authors: D
authors: Youssef
authors: Neamat
authors: N
authors: Hassan
authors: Mohamed
authors: M
authors: El-Meligui
authors: Manal
authors: M
authors: Kamal
authors: Hesham
authors: H
authors: Al-Inany
mesh_terms: D005260:Female; D006801:Humans; D006980:Hyperthyroidism / Q000150:complications*; D008183:Luteal Phase / Q000097:blood* / Q000502:physiology; D016555:Matched-Pair Analysis; D008595:Menorrhagia / Q000209:etiology*; D011388:Prolactin / Q000097:blood; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D014284:Triiodothyronine; D011388:Prolactin; D013972:Thyrotropin; D013974:Thyroxine