Angus LM, Nolan BJ, Zajac JD, Cheung AS A systematic review of antiandrogens and feminization in transgender women. Clin Endocrinol (Oxf). 2021 May;94(5):743-752. doi: 10.1111/cen.14329. Epub 2020 Oct 5.
Bagot CN, Marsh MS, Whitehead M, Sherwood R, Roberts L, Patel RK, Arya R The effect of estrone on thrombin generation may explain the different thrombotic risk between oral and transdermal hormone replacement therapy. J Thromb Haemost. 2010 Aug;8(8):1736-44. doi: 10.1111/j.1538-7836.2010.03953.x. Epub 2010 Jun 14.
Hamidi O, Davidge-Pitts CJ Transfeminine Hormone Therapy. Endocrinol Metab Clin North Am. 2019 Jun;48(2):341-355. doi: 10.1016/j.ecl.2019.02.001. Epub 2019 Mar 23.
Spanos C, Bretherton I, Zajac JD, Cheung AS Effects of gender-affirming hormone therapy on insulin resistance and body composition in transgender individuals: A systematic review. World J Diabetes. 2020 Mar 15;11(3):66-77. doi: 10.4239/wjd.v11.i3.66.
Unger CA Hormone therapy for transgender patients. Transl Androl Urol. 2016 Dec;5(6):877-884. doi: 10.21037/tau.2016.09.04.
Effectiveness and Safety of Different Estradiol Replacement Therapies in Transgender Female
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
