Table 2. Mean (range) of progesterone and testosterone concentrations (ng/g) in female gray whales divided by age class and reproductive state.

Age class description	Reproductive state	Mean progesterone concentrations (range) ng/g	Mean testosterone concentrations (range) ng/g
Calf	Calf	4.7 (1.5–11.0)	0.8 (0.4–1.2)
Whales sighted as calves the year of sampling		(n = 4)	(n = 3)
Immature	Immature	2.2 (0.7–3.5)	0.8 (0.1–2.1)
Whales with known year of birth and known age of less than 8 years		(n = 6)	(n = 6)
Adult	Lactating: observed with calf the year of sampling	2.1 (1.5–3.6)	0.4 (0.1–0–8)
Whales known to be 8 or more years of age
		(n = 6)	(n = 3)
	Pregnant: observed with a calf the year after sampling	19.5 (11.2–30.8)	0.2 (0.2–0.3)
		(n = 4)	(n = 4)
	Adult-unknown: not seen or seen not accompanied by calf	7.9 (0.7–48.9)	0.2 (0.1–0.4)
		(n = 26)	(n = 2)
Unknown	Unknown	9.2 (0.6–61.7)	NA
Females that do not fit in any other categories		(n = 20)