Pictures showing different kind of sperm morphologies:

Normal Sperm

Tapered sperm head:

Round headed sperm:

Amorphous sperm head

Elongated sperm head & sperm with double head

 Sperm with thick tail

Sperm with short tail

Pin head sperm

Semen sample showing plenty of pus cells in the sample, suggestive of infection. This will require treatment with antibiotics.

Semen sample showing leucocytes with ingested sperm head

Semen sample showing RBCs/ blood in semen sample