Choavaratana, R., Malakorn, K., Thanaboonyawat, I., Petyim, S., Laokirkkiat, P., Saad, N. and Prechapanich, J. (2018) “Endometrial Thinning after Ovarian Stimulation using Letrozole or Clomiphene Citrate: A Randomized Trial”, Siriraj Medical Journal, 70(4), pp. 335–342. available at: https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/153930 (accessed: 11 October 2026).