TABLE 1.

Fetal delivery data

AZ route	Autopsy time (h) group	% Male fetuses	Delivery wt (kg)	Arterial cord blood			No. with meconium/total
				pH	pO2	pCO2
Single IA	4 (n = 5)	60	0.33 ± 0.05	7.3 ± 0.05	6.2 ± 0.7	54.6 ± 3.7	0/5
	12 (n = 5)	0	0.36 ± 0.10	7.4 ± 0.04a	7.4 ± 1.3a	52.2 ± 3.8a	0/5
	36 (n = 5)	40	0.32 ± 0.04	7.3 ± 0.06	8.9 ± 1.5a	58.0 ± 7.7	0/5
	72 (n = 5)	40	0.34 ± 0.03	7.3 ± 0.04	6.8 ± 2.3	56.2 ± 4.2	0/5
	120 (n = 5)	80	0.43 ± 0.06	7.3 ± 0.04	7.5 ± 1.0a	61.0 ± 3.3	0/5
12-h maternal i.v.	4 (n = 5)	40	0.33 ± 0.03	7.3 ± 0.05	6.8 ± 0.8	58.0 ± 6.4	0/5
	12 (n = 5)	40	0.31 ± 0.01	7.3 ± 0.08	4.6 ± 0.2	63.0 ± 11.0	1/5
	36 (n = 5)	20	0.35 ± 0.02	7.3 ± 0.06	5.4 ± 0.4	59.4 ± 6.6	0/5
	72 (n = 5)	60	0.34 ± 0.05	7.3 ± 0.04	6.9 ± 1.2	62.3 ± 6.6	0/5
	120 (n = 4)	66b	0.42 ± 0.04	7.3 ± 0.05	5.1 ± 2.2	64.0 ± 7.9	0/4

^aSignificant difference (P < 0.05) between time groups.

^bOnly 3 of the 4 fetuses in this group were sexed at autopsy.