Cross -Over Study to Prove Bioequivalence Between Two Oral Formulations of Levonorgestrel

Inclusion Criteria: * Healthy male volunteers age between 18 and 55 years old with normal vital signs, electrocardiogram (ECG), blood chemistry, liver function profile and urinalysis Exclusion Criteria: * History of illnesses or any organic abnormalities that could affect the results of the study. * History of abuse tobacco or alcohol or regular use of recreational or therapeutic drugs. * Subjects that have taken any medication within 14 days or that are in an elimination period of less than 7 half-lives (whichever is longest) before study startup.