Should I Continue Taking T. Duphaston Until 15 Weeks As Advised During My Second Pregnancy?

Hello, I m in 2nd pregnancy with no history of miscarriage. My doctor advised me to take T.Duphaston 10mg TID from 5th week. Now I m running through 15th week still she advised me to continue it with same dosage. Should I continue to take it or taper the dose and stop as I don t have any complaints.