TABLE 1.1.

Glandular sources of sex steroids in men.

		Adrenal	Testis	References
Androgens	T	7%	90–93%	Scott et al., 1980; Bélanger et al., 1989
	DHT	0–33%	66–100%	Meikle et al., 1979; Bélanger et al., 1989
	Δ4	50%	14–50%	Vermeulen and Verdonck, 1976; Stege et al., 1987; Georgiadis et al., 1992
	DHEA	90%	10%	Vermeulen and Verdonck, 1976
	DHEAS	83–100%	0–17%	Vermeulen and Verdonck, 1976; Stege et al., 1987; Sharifi and Auchus, 2012
Estrogens	E1	50–60%	35–54%	Saez et al., 1972; Arlt et al., 1998; de Ronde et al., 2005
	E2	0	100%	Longcope et al., 1969, 1978; Kelch et al., 1972; Saez et al., 1972; Russell and Grossmann, 2019
Progestin	P	100%	0	Abraham et al., 1971; Vermeulen and Verdonck, 1976

DHEA, dehydroepiandrosterone; DHEAS, dehydroepiandrosterone sulfate; DHT, dihydrotestosterone; E1, estrone; E2, estradiol; P, progesterone; T, testosterone; Δ4, androstenedione.