Table 3.

Correlation Coefficients Between Levels of Steroid Hormones (x) and Uterine Artery Diameter or Blood Flow (y)

Hormone	Low Altitude				High Altitude
	UA dia week 20	UA flow week 20	UA dia week 36	UA flow week 36	UA dia week 20	UA flow week 20	UA dia week 36	UA flow week 36
Androstenedione	NS	NS	NS	NS	NS	NS	NS	NS
Cortisol	NS	NS	NS	NS	NS	−0.62a	NS	NS
17β-Estradiol	NS	NS	NS	NS	NS	NS	0.29b	0.32b
Estriol	NS	NS	NS	NS	NS	NS	0.51a	0.33b
Estrone	NS	NS	NS	NS	NS	NS	NS	NS
Progesterone	NS	NS	NS	NS	NS	NS	0.30b	0.38b
T	NS	NS	NS	NS	NS	NS	NS	NS

Abbreviations: dia, diameter; NS, not significant.

^aP < .01.

^b.05 < P < .10.