A pilot study to assess the feasibility of a RCT to compare the effectiveness of two different progesterone only pills (POP) on reducing pelvic pain

INTERVENTION: Comparison of two different progesterone only pills, Cerazette and Femulen CONDITION: Urological and Genital Diseases: Pelvic pain ; Urological and Genital Diseases ; Pelvic pain PRIMARY OUTCOME: If Cerazette is effective in reducing the pain associated with ovulation and menstruation, it will provide a valuable alternative choice for women who are unable to chose not to take combined oral contraceptives (COCs). SECONDARY OUTCOME: Not provided at time of registration INCLUSION CRITERIA: 1. Females over 18 years of age who require a method of contraception 2. Willing to follow protocol 3. Able to give written consent