title: Review of ovulation return upon discontinuation of once-a-month injectable contraceptives.
abstract: Once-a-month combined injectable preparations draw their contraceptive efficacy from continuous ovulation suppression. When their use is discontinued, ovulation resumes within a few weeks or a few months, depending on the formulation. After use of the dihydroxyprogesterone acetophenide 150 mg/estradiol enanthate 5 mg combination for one to two years, ovulation returns in most subjects 3-4 months after discontinuation of treatment. Similarly, recent data show that after 2-year use of the depot-medroxyprogesterone acetate 25 mg/estradiol cypionate 5 mg or the norethisterone enanthate 50 mg/estradiol valerate 5 mg combination, approximately 70% women have resumed ovulation by the third month post-treatment. This is shorter than the time for return of ovulation experienced by ex-users of progestogen-only injectable contraceptives.
authors.affiliation: Department of Reproductive Biology, School of Medicine, University of Coahuila, Torreon, Mexico.
authors.forename: S
authors.initials: S
authors.lastname: Bassol
authors.forename: J
authors.initials: J
authors.lastname: Garza-Flores
mesh_terms: D003271:Contraceptive Agents, Female / Q000008:administration & dosage*; D003692:Delayed-Action Preparations; D005260:Female; D006801:Humans; D007267:Injections; D010060:Ovulation; D013997:Time Factors
chemical_list: D003271:Contraceptive Agents, Female; D003692:Delayed-Action Preparations