Hi, I'm 25 and my pregnancy is 3 weeks. I had taken cifran for 10 days (2 tabs 500 g a day) (from October 4th till October 13th). My last period started on October 11th. Estimated date of conceiving is October 20-21st. Could you please tell me if it is dangerous for the fetus? Thank you.

Baby should be fine. There are alternatives that might be better if you were taking it during pregnancy, but since this occurred days before you likely became pregnant, the concern is not there.

Congratulations on your pregnancy!