4th year practical revision

Blood in a canine ejaculate (hemospermia)

Semen samples from a bull (left) and dog (right), showing differences in opacity and concentration

     Double headed sperm (bull; eosin-nigrosin stain)

Misshapen head along with 4 normal sperm (bull; toluidine blue stain)

    Elongaged head (bull; eosin-nigrosin stain)Elongated head (bull; toluidine blue stain)

Pyriform (pear-shaped) head and bent, abnormal midpiece (bull; eosin-nigrosin stain)

Misshapen head and proximal droplet (bull; toluidine blue stain)

    Proximal droplet (bull; toluidine blue stain)Distal droplet (bull; toluidine blue stain)

     Detached head (bull; eosin-nigrosin stain)Bent tail or midpiece (bull; eosin-nigrosin stain)

Coiled tail (bull; eosin-nigrosin stain)

Coiled midpiece/tail in one sperm and proximal droplet in another (bull; eosin-nigrosin stain)

Bent or reversed tail

Tightly coiled tail

Detatched head

Wrinkled acrosome - this may reflect a nuclear problem which prevents zona attachment by the sperm cell. It is a rare condition.  

Micromanipulator

Expanded blastocyst

CIDAR

Blastocyst

Collected COCs

4Cell embryo

Compact morula

8Cell Embryo

Hatching blastocyst

One cell embryo with 2 pronuclei

ICSI

2 cell Embryo