Scanning electron micrograph of a hamster oocyte cumulus complex. Cumulus cells (purple) and matrix (gray) are shown. Small blood clots (red) also often appear in oocyte cumulus complexes. The red blo...

Hamster sperm fertilizing a hamster oocyte. This scanning electron micrograph shows hamster sperm fertilizing a hamster oocyte. Fertilization was performed in vivo. Sperm are shown binding to the out...

Stereo pair of an embedment-free section of a detergent-extracted unfertilized hamster egg. The central region of the egg contains two different types of fibrous networks: a thicker network of sheets...

Surface of the zona pellucida surrounding a hamster oocyte. This scanning electron micrograph shows the zona pellicida around a hamster oocyte at high magnification. The zona pellicida has a complex ...

Hamster oocyte and cumulus cells. This scanning electron micrograph shows a hamster oocyte. The oocyte is not directly visible but lies beneath the zona pellucida. The surface of the zona pellucida c...

Stereo pair of an embedment-free section of a detergent-extracted 8-cell embryo reveals the cytoskeletal interior in greater detail than is afforded in resin-embedded sections. The specimen is viewed...