How many previous?
This may depend on how many miscarriages you have had.
It is not uncommon for a woman to have a miscarriage at least once during her reproductive years. I wouldn't worry too much; stressing yourself about your ability to have children
will only be damaging to your overall health. Speak with your ob/gyn or family doctor about your reproductive health
history and your future family plans.
Answer assisted by David Escobar, Medical Student