MOHAMED RAMADAN ALI SHAABAN , O. A. A. E.-A. , A.-M. M. S. , B. seliem S. ,. Comparative Study between the Effect of Vaginal Sildenafil citrate and Estradiol Valerate on Endometrial Thickness in Women Undergoing Induction of ovulation by Clomiphen Citrate. Annals of the Romanian Society for Cell Biology, [S. l.], v. 25, n. 6, p. 13550 –, 2021. Disponível em: http://www.annalsofrscb.ro/index.php/journal/article/view/8161. Acesso em: 29 jul. 2026.