<s>[INST] my age is 26,height is "5.2",weight is 55.i m suffering from PCOS and already missed my pregnancy on 2nd month....now my doctor have suggested to take letrozole tablets with astaxanthin capsules(ova shield).so how it works for ?i want to pregnant? [/INST] Hi, Welcome to Chat Doctor . Letrazole helps in production of multiple healthy ovum so chances of conception increases . Astaxanthin is an antioxidant which helps in improving quality of eggs and also endometrial growth.  So you are advice to continue the tablets.Also, I would suggest you to go for GUI. Here healthy sperms are placed in uterus. This will increase chances of pregnancy. Hope I have been helpful. Regards Chat Doctor.  </s>