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Diakses pada 21 Mei 2019Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/menorrhagia/symptoms-causes/syc-20352829
Diakses pada 21 Mei 2019Healthline. https://www.healthline.com/symptom/menstrual-irregularity
Diakses pada 21 Mei 2019Healthline. https://www.healthline.com/health/womens-health/long-periods#2
Diakses pada 10 Desember 2020