HI, Thanks for the query. Lupride depot is a drug used to treat endometriosis. It acts by dramatically stopping the menstrual hormones , stops the menstrual cycle for at least 3 months from injection. The state of hormonal imbalance due to endometriosis interferes with fertility.So the drug Lupride depot is also used in treatment of IVF .. when needful hormones are provided in calculated dose externally to bring about maturity of ovum/ ovulation . The further process of in vitro fertilization is continued out side the body & fertilized ovum is transferred in mother s uterus. Now about Decdak.. it s a steroidal preparation .. used for treating inflammation/ allergic reaction/ to avoid untoward reaction of drugs. The drug Letroz is a anti malignant drug.. used to treat cancer. * It is also empirically used by some people for de3velopment of follicle ( immature ovum ). But it is having bad effects on embryo ( early stage of fetus ) & fetus .. so it has been legally banned from use in young females. Your doctor might have given Decdak to prevent such bad effect.. but in my view you should stop taking such drug & ask for a safer drug for folicular development by discussing it with your doctor/ have second opinion about the thing. Thanks..