Table I.

Seven CBCs drawn within the first 48 hours of birth from 4 neonates with congenital iron deficiency anemia

Patient	GA, wk	BW, g	IDM, Y/N	SGA, Y/N	Mother’s BMI	HCT, %	Ret-He, pg	MicroR, %	MCV, fL	HYPO-HE, %	MCH, pg
1	39	4486	Y	N	27.4	41.4	18.9	8.4	90.1	14.1	28.9
						41.4	20.4	7.3	93.0	16.9	28.5
2	34*	2070	N	N	40.2	32.5	24.3	14	92.7	14.8	30.1
						32.5	25.0	13.6	91.2	18.3	30.5
3	28	1000	Y	N	41.0	33.4	27.2	8.3	86.8	11.6	26.5
4	34*	2060	N	N	40.2	33.7	24.8	7.7	94.1	10.6	31.0
						33.7	25.0	7.0	92.7	13.0	31.0

GA, gestational age; BW, birth weight; IDM, infant of mother with diabetes; Y, yes; N, no; BMI, body mass index; HCT, hematocrit.

Bolded values indicate a laboratory parameter outside the reference interval for gestational and postnatal age.²⁴

^*Twins with alpha thalassemia trait (hemoglobin Barts, plus a 3-bp duplication in the alpha globin gene [c.364_366dupGTG]).²²