TABLE A8. LIVE BIRTHS AND PERCENTAGE DISTRIBUTION, BY WHETHER MOTHER RECEIVED PRENATAL CARE, TIME DURING PREGNANCY CARE BEGAN, AND RACE OF MOTHER MISSISSIPPI, 1997 NUMBER PERCENT PRENATAL CARE AND NON- NON- TIME CARE BEGAN TOTAL WHITE WHITE TOTAL WHITE WHITE TOTAL 41,527 22,021 19,506 100.0 100.0 100.0 NO PRENATAL CARE 548 105 443 1.3 0.5 2.3 SOME PRENATAL CARE 40,856 21,867 18,989 98.4 99.3 97.4 FIRST TRIMESTER 33,098 19,579 13,519 79.7 88.9 69.3 SECOND TRIMESTER 6,505 1,969 4,536 15.7 8.9 23.2 THIRD TRIMESTER 1,150 295 855 2.8 1.3 4.4 UNKNOWN MONTH 103 24 79 0.2 0.1 0.4 UNKNOWN WHETHER ANY PRENATAL CARE 123 49 74 0.3 0.2 0.4 TABLE A9. LIVE BIRTHS AND PERCENTAGE DISTRIBUTION, BY MATURITY AND RACE OF MOTHER MISSISSIPPI, 1997 NUMBER PERCENT NON- NON- MATURITY* TOTAL WHITE WHITE TOTAL WHITE WHITE TOTAL 41,527 22,021 19,506 100.0 100.0 100.0 IMMATURE ONLY** 1,552 616 936 3.7 2.8 4.8 PREMATURE ONLY** 3,697 1,544 2,153 8.9 7.0 11.0 BOTH IMMATURE AND PREMATURE 2,641 1,005 1,636 6.4 4.6 8.4 TOTAL IMMATURE 4,193 1,621 2,572 10.1 7.4 13.2 TOTAL PREMATURE 6,338 2,549 3,789 15.3 11.6 19.4 TOTAL IMMATURE AND/OR PREMATURE 7,890 3,165 4,725 19.0 14.4 24.2 NEITHER IMMATURE NOR PREMATURE** 33,637 18,856 14,781 81.0 85.6 75.8 * IMMATURE - BIRTHWEIGHT LESS THAN 5 1/2 POUNDS (2,500 GRAMS); PREMATURE - GESTATION LESS THAN 37 WEEKS (CALCULATED BY SUBTRACTING THE DATE OF THE LAST NORMAL MENSTRUAL PERIOD PRIOR TO DELIVERY FROM THE DATE OF BIRTH). ** BIRTHS CLASSIFIED AS IMMATURE ONLY OR AS PREMATURE ONLY INCLUDE SOME FOR WHICH THE OTHER MEASUREMENT WAS UNKNOWN. THOSE CLASSIFIED AS NEITHER IMMATURE NOR PREMATURE INCLUDE SOME FOR WHICH ONE OR BOTH MEASUREMENTS WERE UNKNOWN.