1. Seaman B. The Greatest Experiment Ever Performed on Women: Exploding the Estrogen Myth. USA: Seven Stories Press; 2011. p. 1–352.
2. Yassaee F, Shekarriz-Foumani R, Afsari S, et al. The effect of progesterone suppositories on threatened abortion: a randomized clinical trial. J Reprod Infertil. 2014;15(3):147–151.
3. PROMISE: first-trimester progesterone therapy in women with a history of unexplained recurrent miscarriages- a randomised, double-blind, placebo-controlled, international multicentre trial and economic evaluation;Coomarasamy;Health Technol Assess,2016
4. Beigi A, Esmailzadeh A, Pirjani R. Comparison of risk of preterm labor between vaginal progesterone and17-Alpha-Hydroxy-progesterone caproate in women with threatened abortion: a randomized clinical trial. Int J Fertil Steril. 2016;10(2):162–168.
5. Progestogens in the prevention of miscarriage;Carp;Horm Mol Biol Clin Investig,2016