1. Ferraretti AP, Goossens V, Kupka M, Bhattacharya S, de Mouzon J, Castilla JA, Erb K, Korsak V, Nyboe Andersen A, IVF-monitoring E (2013) Assisted reproductive technology in Europe, 2009: results generated from European registers by ESHRE. Hum Reprod 28(9):2318–2331
2. Nekoo EA, Chamani M, Tehrani ES, Rashidi BH, Tanha FD, Kalantari V (2015) Artificial endometrial preparation for frozen-thawed embryo transfer with or without pretreatment with depot gonadotropin releasing hormone agonist in women with regular menses. J Family Reprod Health 9(1):1
3. Ghobara T, Gelbaya TA, Ayeleke RO (2017) Cycle regimens for frozen-thawed embryo transfer. Cochrane Database Syst Rev. https://doi.org/10.1002/14651858.CD003414.pub3
4. Niu Z, Feng Y, Sun Y, Zhang A, Zhang H (2008) Estrogen level monitoring in artificial frozen-thawed embryo transfer cycles using step-up regime without pituitary suppression: is it necessary? J Exp Clin Assist Reprod 5(1):4
5. Groenewoud ER, Cantineau AE, Kollen BJ, Macklon NS, Cohlen BJ (2017) What is the optimal means of preparing the endometrium in frozen-thawed embryo transfer cycles? A systematic review and meta-analysis. Hum Reprod Update 23(2):255–261