<s>[INST] Hello doctor,I am under pcos and pregnancy treatment. I used siphene 100mg and metformin for 5 days.Today 7th day she prescribed (fsh)ovitrop 75iu.What is the success rate of ovitrop injection and how many days i need to take this injection.I heard there is chance of multiple pregnancy how to avoid it. [/INST] Hi welcome to Chat Doctor. I have gone through your question. Ovitrop in contains follicular stimulating hormone. Which helps in stimulating follicles in pod (polycystic ovarian disease). There are chances of multiple pregnancy AA it stimulates more than one follicle, and may fertilise more than one follicle's cause twins, triplets, qua Chat Doctor. This injection may be needed for 3/5 days according to need. Success varies from patient to patient. Hope I have answered your question. Would be happy to help you further. Take care. </s>