i was taking duphaston during my 1st pregnancy, for about the 1st three month.
My friend also being prescribed by her gynae, she took for all her three pregnancy. Believed it is the norm that gynae prescribed to stable the situation. Some even need to have injection.
My gynae called it is 'onn toi' pill.
Yes, it is not suitable to take xtra supplement (chinese herb) until condition is stable... esp the 1st trimester