Table 3.02 - Mean Circulating Maternal Plasma, Red Cell and Total Blood Volumes during Pregnancy.

Week of gestation	Plasma		Red cells		Blood
	ml	ml/kg	ml	ml/kg	ml	ml/kg
Nonpregnant	2800	50	1550	27	4350	77
6	2900	52	1500	26 - 27	4400	79
12	3100	54	1575	27	4675	81
16	3400	57	1625	27	5025	84
20	3800	63	1650	27	5450	90
24	4400	68	1775	27	6175	95
28	4400	66	1800	27	5200	93
32	4600	67	1825	27	6425	94
36	4700	70	1875	27	6575	97
40	4700	72	1975	27	6675	99

Note: Thus, hematocrit declines from 1550/4350 x 100 = 35.6% in a non-pregnant woman, to 1975/6675 x 100 = 29.6% in a pregnant woman at term.