I Had D And C 3 Months Back. I Had

I had d and c 3 months back. I had spotting at 6 weeks and 2 days. Susten was given for 10 days. No spotting or symptom of miscarriage till12 week. When i go for scan fetal growth stopped at 7 weeks and 3 days
(when i stopped susten growth also stopped).

Again i am 6 weeks now, spottin today morning. Recommended to take 10mg duphaston.

Which is better like duphaston(10mg) or susten200mg