Zegers-Hochschild F, Adamson GD, Dyer S, et al. The International Glossary on Infertility and Fertility Care, 2017. Hum Reprod. 2017;32(9):1786–801.

Greil AL, Slauson-Blevins K, McQuillan J. The experience of infertility: a review of recent literature. Sociol Health Illn. 2010;32(1):140–62.

Cousineau TM, Domar AD. Psychological impact of infertility. Best Pract Res Clin Obstet Gynaecol. 2007;21(2):293–308.

World Health Organization (WHO). Infertility fact sheet. Available from: https://www.who.int/news-room/fact-sheets/detail/infertility [Accessed 2025 May 14].

Valeria Cetorelli. The effect on fertility of the 2003-2011 war in Iraq.Population and development review .2014;40(4):581-604.

Alhassan A, Ziblim A, Muntaka S. A survey on knowledge and perception of infertility among women in Northern Ghana. Int J Womens Health. 2014;6:587–93.

Eskew AM, Bedrick BS, Hardi A. Letrozole compared with clomiphene citrate for unexplained infertility: A systemic review and meta-analysis .Obstet Gynecol 2019;133(3):437-444.

Fauser BC, Tarlatzis BC, Rebar RW, et al. Consensus on women's health aspects of polycystic ovary syndrome (PCOS): the Amsterdam ESHRE/ASRM-Sponsored 3rd PCOS Consensus Workshop Group. Fertil Steril. 2012;97(1):28–38.

Mascarenhas MN, Flaxman SR, Boerma T, Vanderpoel S, Stevens GA. National, regional, and global trends in infertility prevalence since 1990: a systematic analysis of 277 health surveys. PLoS Med. 2012;9(12):e1001356.

Ludwig M, Finas DF, Al-Hasani S, et al. Clinical use of hysteroscopy in the diagnosis and treatment of infertility. Gynaecol Endosc. 2011;10(1):5–10.

Pandian Z, Gibreel A, Bhattacharya S. In vitro fertilisation for unexplained subfertility. Cochrane Database Syst Rev. 2015;(11): CD003357.

Leila Pourali, Sedigheh Ayati, Shirin Tavakolizadeh. Clomiphene citrate versus letrozole with gonadotropins in intrauterine insemination cycle: A randomized trial.Int J Reprod Bio Med.2017;12(1):49-54.

World Health Organization (WHO). Application for the inclusion of aromatase inhibitors as ovulation induction agents in the WHO Model list of Essential Medicines(2023) for adult . Available from: https://www.who.int/news-room/fact-sheets/detail [Accessed 2022 December 14th].

Yang X, Lin G, Lu G, Gong F. Letrozole supplementation during controlled ovarian stimulation in expected high responders: a pilot randomized controlled study. Reprod Biol Endocrinol. 2019;17(1):43.

T. Tatsumi, S.C.Jwa,A.Kuwahara,M.Irahara. No increased risk of major congenital anomalies oradverse pregnancy or neonatal outcomes following letrozoleuse in assisted reproductive technology.Human Reproduction.2017;32(1):125-132.

Bayar U, Tanriverdi HA, Barut A, Ayoglu F, Ozcan O, Kaya E. Letrozole vs. clomiphene citrate in patients with ovulatory infertility. Fertil Steril. 2006;85(4):1045–8.

Legro RS, Brzyski RG, Diamond MP, et al. Letrozole versus clomiphene for infertility in the polycystic ovary syndrome. N Engl J Med. 2014;371(2):119–29.

Badawy A, Shokeir T, Allam AF, Abdelhafez MS. Pregnancy outcome after ovulation induction with letrozole or clomiphene citrate. Fertil Steril. 2009;92(3):849–52.

Li X, Zhao L, Chen Y, Wang Z, Liu X. Letrozole vs. clomiphene citrate in ovulation induction: a systematic review and meta-analysis. Reprod Biomed Online. 2021;42(2):303–12.

Wang R, Lin J, Shao D, Li T. Comparative effectiveness of letrozole and clomiphene in PCOS-related infertility. Hum Reprod Update. 2023;29(1):112–29.

Mitwally MFM, Casper RF. Aromatase inhibitors versus SERMs in ovulation induction. Fertil Steril. 2020;113(1):39–46.

Norman RJ, Codner E, Wang Y, Teede H. Ovulation induction pharmacology: comparing agents. J Clin Endocrinol Metab. 2021;106(5):e2068–75.

Al-Rashid F, Ali Z, Hassan M, Kareem D. Incidence of multiple pregnancies following ovulation induction: letrozole vs. clomiphene. Middle East Fertil Soc J. 2024;29(1):102–8.

Ganesh A, Menon V, Subramaniam P, Rao P. Risk of congenital anomalies with letrozole: a meta-analysis. Fertil Steril. 2022;117(3):522–30.

Eapen A, Patel R, Shinde S, Thomas A. Patient experience and tolerability of ovulation induction drugs: a cohort study. Int J Gynaecol Obstet. 2020;149(2):172–9.