1. The outcome of 150 babies following the treatment with letrozole or letrozole and gonadotropins;Biljan;Fertil Steril,2005
2. A new era of ovulation induction;Holzer;Fertil Steril,2006
3. Fontana PG, Leclerc JM. Contraindication of Femara® (letrozole) in premenopausal women. Available at: http://www.ca.novartis.com/downloads/en/letters/femara_hcp_e_17_11_05.pdf
4. Catalog of teratogenic agents;Shepard,2001
5. Congenital malformations among 911 newborns conceived after infertility treatment with letrozole or clomiphene citrate;Tulandi;Fertil Steril,2006