Table 2.

10th, 25th, 50th, 75th, and 90th percentiles of hematological parameters (leukocytes, thrombocytes, hemoglobin, hematocrit, neutrophilic granulocytes, lymphocytes) for each gestational age (23 + 0 to 34 + 0 weeks) on the first day after birth (comparable to day 1 in Fig. 1). For certain parameters, including lymphocyte counts and neutrophilic granulocytes at the lowest gestational ages, the number of available samples was limited. These percentiles should therefore be interpreted with caution

Gestational age	n	10th	25th	50th	75th	90th	n	10th	25th	50th	75th	90th
	Leukocytes (cells/µL)						Thrombocytes (cells/µL)
23	30	5023	8943	10,760	19,433	23,023	36	128,000	139,750	177,000	203,000	302,000
24	74	6028	8480	12,940	21,710	25,961	85	124,000	155,000	212,000	264,000	315,800
25	60	5299	7405	9685	14,938	22,623	67	121,400	154,000	190,000	253,000	286,600
26	96	4860	6675	10,485	14,260	20,155	105	105,500	141,000	187,000	246,000	280,800
27	101	4670	7410	10,100	13,205	18,450	107	95,600	124,250	183,000	227,500	285,200
28	151	5540	7260	10,040	14,140	18,110	160	104,900	136,000	191,000	230,000	308,300
29	162	5610	6989	9435	12,150	15,677	168	110,700	138,750	186,500	227,250	282,300
30	205	5836	8020	10,560	14,680	17,410	212	133,100	153,750	193,500	242,250	287,800
31	307	6666	9005	11,520	14,360	17,474	310	111,800	153,250	191,000	238,750	284,100
32	507	7876	9935	12,840	15,775	18,760	518	132,400	166,000	210,000	252,000	292,300
33	691	8700	10790	13,510	16,805	20,270	702	127,000	165,250	211,500	256,000	297,000
34	175	9184	11,190	14,420	17,390	20,494	178	122,000	168,500	212,500	255,000	304,300
	Hemoglobin (g/dL)						Hematocrit (%)
23	36	12.8	13.9	15.0	16.8	18.3	36	37.1	40.5	43.1	48.9	50.4
24	85	12.8	13.8	15.2	17.3	18.4	85	37.4	39.4	43.0	48.4	52.2
25	67	12.5	13.7	15.0	16.3	18.4	67	35.0	39.7	42.3	46.5	50.6
26	105	12.9	14.5	16.0	17.3	19.3	105	37.6	40.9	44.6	49.2	54.3
27	107	14.4	15.8	17.3	18.8	20.4	107	40.9	44.2	49.4	52.0	56.8
28	160	13.9	15.8	17.5	19.4	20.5	160	39.5	44.3	48.9	53.4	57.3
29	168	14.7	16.1	17.6	19.2	21.2	168	40.6	44.9	49.1	54.4	58.8
30	212	14.8	16.4	17.9	19.5	20.7	212	41.4	45.6	49.9	54.0	57.5
31	310	15.4	16.8	18.6	20.1	21.2	310	42.9	46.6	51.6	55.1	59.5
32	518	14.7	16.7	18.2	19.8	21.3	518	40.8	45.7	50.0	54.7	58.2
33	702	15.1	16.6	18.3	19.9	21.4	702	41.5	45.8	50.1	54.5	58.9
34	178	14.8	16.3	18.0	19.7	21.0	178	40.8	44.7	49.0	53.9	57.5
	Neutrophilic granulocytes (cells/µL)						Lymphocytes (cells/µL)
23	11	2900	4950	7500	14,700	16,700	11	1000	2100	2200	3000	3500
24	24	1920	4175	7500	15,950	20,310	24	1330	2125	2800	4000	6290
25	15	1740	2700	5400	11,850	18,500	15	1520	2225	2700	3250	3760
26	24	1220	2550	4050	6600	15,180	24	845	1538	2200	3300	5170
27	27	3370	4500	5500	10,500	17,700	27	1520	1950	2700	4500	5360
28	38	2095	3900	5000	6675	11,290	38	1440	2200	2700	3700	5160
29	48	2600	3175	4375	6725	15,610	48	1440	1775	2500	3425	5330
30	53	2500	3200	4300	9200	12,420	53	1720	2100	2700	3600	4260
31	98	2670	4125	6050	7550	9430	97	1600	2200	3000	3800	4540
32	114	3100	4575	6200	8575	10,880	114	1930	2600	3100	3900	4770
33	174	4030	5250	7600	10,150	12,300	170	2200	2825	3500	4475	5310
34	41	4200	6200	7800	11,400	14,800	39	2560	2950	3600	4150	4940