Table 3.

Comparisons of Hormone Concentrations in PREG 1 and PREG 2

Status	Hormone	Comparison of Means	Proportion
		Paired t test of PREG 1 and PREG 2 means	Mean of (PREG 2 ÷ PREG 1) × 100
Pregnancy	ACTH	t (20) = 1.6; P = 0.13	96.02%
	pCRH	t (18) = 1.8; P = 0.08	91.92%
	Cortisol	t (18) = −0.91; P = 0.37	107.22%a
	Estradiol	t (18) = 0.01; P = 0.98	101.89%
	Progesterone	t (19) = 0.45; P = 0.66	101.63%
Post-partum	ACTH	t (23) = 14; P = 7.8e-13	49.96%
	Cortisol	t (23) = −16; P = 5.2e-14	59.28%a

The Comparison of Means column lists results of paired t tests in which mean hormone levels in PREG 1 and PREG 2 were compared. P values reflect whether hormone levels in PREG 1 were significantly distinct from hormone levels in PREG 2. There are no statistically significant differences, besides pCRH [t(18) = 1.8; P = .08; mean (M) of differences = 73.67 pg/mL; M of the absolute value of differences = 142.77 pg/mL].

The Proportion column lists the means of PREG 2 hormone levels as a function of PREG 1 levels. Cortisol data were residualized by time of day at collection unless otherwise indicated.

^aCalculated using unresidualized cortisol values.