Table 3. Effect of a chronic treatment for 60 days at low concentrations of HgCl₂ on sperm morphology of rats.

Parameters	Experimental groups
	Control (n = 10)	HgCl2 (n = 10)
Normal	95.5 (92.5–96.7)	86.7 (80.1–90.1)**
Head Abnormalities
Amorphous	1.5 (0.6–2.8)	2.7 (1.5–7.5)
Banana Head	0.2 (0.0–0.5)	4.5 (1.7–7.1) **
Detached Head	2.0 (0.5–2.8)	1.7 (1.0–3.8)
Total of Head Abnormalities	3.7 (3.5–5.1)	11.0 (6.7–13.6)**
Tail Abnormalities
Bent Tail	0.5 (0.0–1.0)	2.2 (1.3–4.6)**
Broken Tail	0.5 (0.0–1.2)	0.7 (0.0–1.5)
Total of Tail Abnormalities	1.2 (0.2–1.5)	3.2 (1.8–5.1)**

Data are in percentage and expressed as median (Q₁–Q₃). **p<0.01 (Mann – Whitney).