1. Food and Drug Administration.Establishing effectiveness and safety for hormonal drug products intended to prevent pregnancy guidance for industry. 2019. Available from:https://www.fda.gov/regulatory‐information/search‐fda‐guidance‐documents/establishing‐effectiveness‐and‐safety‐hormonal‐drug‐products‐intended‐prevent‐pregnancy‐guidance
2. European Medicines Agency.Clinical investigation of steroid contraceptives in women—scientific guideline. 2005. Available from:https://www.ema.europa.eu/en/clinical‐investigation‐steroid‐contraceptives‐women‐scientific‐guideline
3. Food and Drug Administration.FDA guidelines: the extent of population exposure to assess clinical safety: for drugs intended for long‐term treatment of non‐life‐threatening conditions. 1995. Available from:https://www.fda.gov/regulatory‐information/search‐fda‐guidance‐documents/e1a‐extent‐population‐exposure‐assess‐clinical‐safety‐drugs‐intended‐long‐term‐treatment‐non‐life
4. European Medicines Agency.ICH Topic E 1 population exposure: the extent of population exposure to assess clinical safety. 1995. Available from:https://www.ema.europa.eu/en/documents/scientific‐guideline/ich‐e‐1‐population‐exposure‐extent‐population‐exposure‐assess‐clinical‐safety‐step‐5_en.pdf
5. The regulation of spermatogenesis by androgens