Table 4 Distribution of physician-assessed secondary sex characteristicsa
From: Fluoride exposure and pubertal development in children living in Mexico City
Measure | Stage | N (%) |
|---|---|---|
Boys | ||
Pubic hair | 1 | 42 (26.8) |
2 | 23 (14.7) | |
3 | 41 (26.1) | |
4 | 22 (14.0) | |
5 | 29 (18.5) | |
Genitalia | 1 | 9 (5.7) |
2 | 30 (19.1) | |
3 | 32 (20.4) | |
4 | 57 (36.3) | |
5 | 29 (18.5) | |
Testicular volume | Yes (> = 20 ml) | 101 (64.3) |
No | 56 (35.7) | |
Girls | ||
Pubic hair | 1 | 16 (9.4) |
2 | 53 (31.0) | |
3 | 44 (22.5) | |
4 | 37 (21.6) | |
5 | 21 (12.3) | |
Breast | 1 | 10 (5.9) |
2 | 26 (15.2) | |
3 | 49 (28.7) | |
4 | 59 (34.5) | |
5 | 27 (15.8) | |
Menarche | Yes | 137 (78.3) |
No | 38 (21.7) | |