Yes, it is safe to become pregnant after a miscarriage. Prenatal care would be taking a prenatal vitamin and folic acid, increase water intake, eat healthfully, exercise (lose weight if you're overweight), etc. Most women have a miscarriage or two in their lifetime whether they realize it or not; due to genetic anomalies that are beyond our control.
If you know why you miscarried (blood clotting disorder, uterine issue, cervical issue, low progesterone, etc.) then you can treat those particular issues.
I agree with JoyRenee :-)