What Is The Dosage Of Dubagest SR?

Hi everybody, I am 35 years old and have just completed my 3rd trimester, this is my 5th conception ( took MTP pills twice , had one miscarriage, had one ectopic previously). My doctor had advised me Tab Dubagest SR 300mg once daily and tab Duphaston twice daily in the start of the pregnancy. But she wants tab dubagest SR 300 mg to be continued till the end of 4rth month, is it ok? I am very much worried as i have read that this tab is prescribed till the end of first trimester only...please answer!!