Table 2.

Serum gonadotropins, gonadal and adrenal steroids in stages of pubertal development in (a) girls and (b) boys (with respective testis volumes)

Girls
Tanner stage	LH (IU/L)	FSH (IU/L)	Estradiol (pmol/L)	DHEAS (µmol/L)
1	0.01–0.21	0.50–2.41	5–10	<0.5
2	0.27–4.21	1.73–4.68	5–115
3	0.17–4.12	2.53–7.04	5–180
4	0.72–11.01	1.26–7.37	25–345
5	2.4–12.6	3.5–12.5	45–854	1.6–7.8

Boys
Tanner stage	Testicular volume (ml)	LH (IU/L)	FSH (IU/L)	Testosterone (nmol/L)	DHEAS (µmol/L)
1	<4	0.02–0.42	0.22–1.92	<0.5	<0.5
2	4–8	0.26–4.84	0.72–4.60	0.4–2.4
3	8–10	0.64–3.74	1.24–10.37	2.1–9.5
4	10–20	0.55–7.15	1.70–10.35	4.9–17.9
5	20–25	1.7–8.6	1.54–12.4	11.1–26.9	2.3–10

Note: Values adapted from Knorr et al. ⁴⁶  and Barts Health biochemistry data.

Abbreviations: DHEAS, dehydroepiandrosterone sulphate; FSH, follicle‐stimulating hormone; LH, luteinizing hormone.