A Study on the Safety and Efficacy of the SCu300A IUB Compared to the TCu380 Copper IUD

Inclusion Criteria: \* Adult females aged 25-42 * Free and willing to fully comply with treatment process * Healthy women seeking LARC * Married or in a steady relationship (at least 1 year) * Blood hemoglobin \>11.5gr% * Signed informed consent form * If took COCP at least had one cycle after use of OC Exclusion Criteria(major) * Use IUB/IUD as an emergency contraception * A previously placed IUD that has not been removed * Pregnancy or suspicion of pregnancy * Use of other contraception method (condom for either male or female, oral contraceptives, diaphragms, spermicides, hormonal patches, injections or ring, cervical cap) * History of pelvic inflammatory disease, recent or remote. * Postpartum endometritis or post abortal endometritis in the past 3 month * Mucopurulent cervicitis * Endometrial thickness more than 12 mm on insertion date * Known anemia * History of previous IUD complications * Dysfunctional uterine bleeding * Undiagnosed uterine bleeding * Malignancy or suspected malignant disease of female inner or outer genitalia * Distortions of the uterine cavity by uterine fibroids or known anatomical abnormalities * Known intolerance or allergy to nitinol or copper and/or copper IUDs - Wilson's disease. * Medication that may interfere with the subject's ability to complete the protocol * Use of injectable contraception in the previous year * Any other significant disease or condition that could interfere with the subject's ability to complete the protocol * A history of alcohol or drug abuse * Known infection with human immunodeficiency virus (HIV), Hepatitis B or Hepatitis C * Pregnancy or pregnancy planned during the year * Enrollment (less than 30 days after completing another study) in or planned to be enrolled in another study