preferred_name: Prenatal flow sheet documented in medical record by first prenatal visit (documentation includes at minimum blood pressure, weight, urine protein, uterine size, fetal heart tones, and estimated date of delivery). Report also: date of visit and, in a separate field, the date of the last menstrual period [LMP] (Note: If reporting 0501F Prenatal flow sheet, it is not necessary to report 0500F Initial prenatal care visit) (Prenatal)