Table 2.

Maximum uterine artery relaxation responses (percent relaxation from submaximal responses to phenylephrine) to various agonists in Wistar and GK nonpregnant and pregnant rats

	Wistar		GK
	Nonpregnant	Pregnant	Nonpregnant	Pregnant
ACh	87.2 ± 3.56	80.2 ± 4.71	74.7 ± 6.24	84.3 ± 4.10
Sodium nitroprusside	92.3 ± 1.31	69.7 ± 7.82a,b	81.8 ± 2.61	88.3 ± 2.81
NONOate	97.5 ± 1.27	90.3 ± 2.73a	97.4 ± 0.76	96.1 ± 1.67
8-Bromoguanosine 3′,5′-cyclic monophosphate sodium salt	66.6 ± 6.07	66.5 ± 7.92	65.9 ± 11.73	71.9 ± 3.02
Sildenafil	85.1 ± 5.91c	46.7 ± 4.18a	53.1 ± 6.05	44.8 ± 5.63

Values are means ± SE; n = 8–10 for Wistar nonpregnant, n = 4–9 for Wistar pregnant, n = 4–10 for GK nonpregnant, and n = 4–9 for GK pregnant.

^aP < 0.05: Wistar nonpregnant vs. Wistar pregnant;

^bP < 0.05: Wistar pregnant vs. GK pregnant;

^cP < 0.05: Wistar nonpregnant vs. GK nonpregnant.