<s>[INST] I took letrozole for ovulation and cycle 13 my follicle size was 20 mm and got hcg on same day and she prescribed to take duphaston after 2 days of hcg my question is unfortunately I took a dhuphaston tablet on the same day of hcg is it harms my ovulation pls help to come out from this :( [/INST] Hello and Welcome to ‘Ask A Doctor’ service.  I have reviewed your query and here is my advice. I think it will not harm anything. So, don't worry about it. Continue duphaston as prescribed by your doctor. Do a urine pregnancy test to rule out pregnancy after course of duphaston. Hope I have answered your query. Let me know if I can assist you further.Regards,Dr. Khushboo Priya </s>