I had that question too and answer is No.. there is not an increased risk for malformations with Letrozole..
Still, they should not be taken while pregnant...
Ill post these articles, hope they can help:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2278348/
https://www.medpagetoday.com/obgyn/infertility/3144
https://www.google.com.mx/amp/www.in...%3fhs_amp=true
Sent from my iPhone using Tapatalk