Table 1.

Average of maternal hemoglobin level (g/dl) taken at first, second, and third trimester of pregnancy

Place	1st Trimester	2nd Trimester	3rd Trimester
	n = 5,003	n = 16,658	n = 13,788
Lima, 150 m*	11.57±1.20	11.42±1.06	10.94±1.23
Huaraz, 3,070 m*	13.32±1.34	12.88±1.37	12.67±1.32
Huancayo, 3,280 m*	13.94±1.41	13.62±1.34	13.37±1.31
Cuzco, 3,400 m*	13.73±1.38	13.61±1.42	13.46±1.45
Huancavelica, 3,640 m*	13.99±1.44	13.75±1.36	13.98±1.66
Puno, 3,800 m*	13.79±1.52	13.58±1.44	13.45±1.44
Cerro de Pasco, 4,340 m*	15.18±1.89	14.60±1.83	14.02±1.69

Values are expressed as means ± SD; n = number of subjects.

^*ANOVA P < 0.001. Scheffé test P < 0.001 between all trimesters.