Hank briefs us on the news that a team of biologists has developed the first contraceptive for males that is totally effective, easily reversible and doesn't mess with your hormones!

Howcast - Learn the five most common causes of male infertility in this Howcast video.

In this video, Jonathan from the Institute of Human Anatomy discusses the components of semen, why it is necessary for sperm cells and reproduction, and the glands that produce it such as the prostate gland.

Microbiology: Motility Test

Microscopic view of Flagellates and spirochaeta bacteria, Differential Interference Contrast

Paramecium and Spirochaeta bacteria moving around algal cell

Microscopic view of Flagellates and Euglena sp.(Euglena is classed as both an animal and an alga due to is ability to both move and photosynthesise) Differential Interference Contrast

Bacteria, animation. These bacteria have flagella extending from one end, which are beaten for propulsion

Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast

Moving across clear freshwater sample to view Spirochaeta bacteria moving around algal cells, Phase Contrast

Ciliates, spirochaeta bacteria and bacteria from pond water, good cilia action

Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast; good motility

Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast; good motility

Ciliates, Spirochaeta and other bacteria moving in pond water. Dark Field

Microscopic view of Ciliates and filamentous algae in background

Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast; good motility

Spirochaeta and other bacteria moving in pond water. Dark Field

Microscopic view of Ciliates and filamentous algae in background

Mass of Spirochaeta bacteria and other bacteria moving in pond water. Phase Contrast; good motility

Microscopic view of Spirochaete bacteria

CU microscopic view of Spirochaete bacteria motility, freshwater farmyard pool

CU microscopic view of Spirochaete bacteria motility, freshwater farmyard pool

Paramecium, showing organelles clearly, and Spirochaeta and other bacteria moving in pond water, Phase Contrast

Recent, Los Angeles

1. Mid shot of lab technician at California Cryobank facility opening sperm sample storage
tank
2. Close shot of label on st
orage tank
3. Close shot looking into...