Knowing up and down seems key for sperm to reach an egg.
Live Science on MSN
Astronauts may struggle to reproduce in outer space, study suggests
A new study found that microgravity simulated on Earth hindered sperm cell movement, egg fertilization and embryo development ...
Sperm may lose their ability to navigate in microgravity, raising new questions about whether human reproduction is possible in space.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results