I am 28 year old women weight 58 height 5.2, my doctor suggest me letroz 2.5 ml from 3rd day of my period and continue for 5 days.. and after that she will do my ovulation study. please suggest me should i take this medicine ? i read few articles which says negative about this medicne and have many harmfull effects..like abortion,,defective delivery etc.. , m healthy..got married 2 year back.was facing irregular periods, and i also had thyriod which is under control now. my dotor suggest me this medicne. i am consuliting for pregnancy m facing problem to conceive. earlier my period was irregular due to thyroid problem but its ok .now i have regular period and my thyroid is also normal but unable to conceive..my doctor suggest me to take letroz..but when i read about the side effects of this medicine on internet i affraid to take this please suggest me what should i do ? should i take this medicine? Women who are given Letroz to improve fertility are at risk of abortion (soon after conception), giving birth to babies with defective organs and even cancer. This warning has been issued both by the Canadian drug regulatory authority and Novartis - the research company that discovered letrozole. Unfortunately in clear violation of law and ethics, some Indian companies have been aggressively promoting its use for fertility just to make more money. Doctors are equally to blame for using the drug in contravention of ethics and law.