Primary dysmenorrhea (PD) is defined as recurrent, crampy pain occurring with menses in the absence of identifiable pelvic pathology. Standard initial management of PD includes NSAIDs as a first-line treatment and oral contraceptives for the relief of pain and improved daily activity. In patients who have persistent dysmenorrhea despite medical therapy of NSAIDs and/or oral contraceptives, further investigation including pelvic ultrasound, hysteroscopy or laparoscopy may be needed to rule out other underlying pathologies. Historically, It is an old clinical observation that primary dysmenorrhea is often completely or partially relieved by childbearing. Similarly, the investigators have observed that the diagnostic/operative hysteroscopy led to relive of pain in most of the cases in our practice. Therefore, the investigators hypothesized that the process of cervical dilatation can have a role in reducing pain of patients with dysmenorrhea. In this randomized, controlled study, it was aimed to assess the effect of operational cervical dilatation on the pain in patients with primary dysmenorrhea.

Patients who applies to the outpatient clinic for reasons non-related to the dysmenorrhea (e.g. infertility investigation) will be assessed for the presence of primary dysmenorrhea by history taking and anamnesis. Patients will be randomized to have cervical dilatation and hysteroscopy or no intervention until the follow-up duration.

Inclusion Criteria:

• Patients who applies to the outpatient clinic for reasons non-related to the dysmenorrhea (e.g. infertility investigation)
• Patients whose history and anamnesis indicate primary dysmenorrhea.
• Aged over 18 years old
• Nulliparous women

Exclusion Criteria:

• History of uterine surgery/operation
• History and clinical examinations which are indicative of secondary dysmenorrhea (Endometriosis, Adenomyosis, Uterine myomas, Endometrial polyps, Cervical stenosis, etc.)
• Positive pregnancy test

Upon request

Investigator diagnosed primary dysmenorrhea with clinical history and anamnesis. Investigator refers the patient to the surgical nurse and nurse performs the randomization process and prepare the patient (control group) for the cervical dilatation and hysteroscopy and schedule the control group for follow-up (expectant). The outcomes assessor is also blind to the assigned group.