Longer term risks and in vitro fertilization
- Sperm and embryo storage
Frozen sperm and embryos are stored in thin plastic straws immersed in liquid nitrogen. Cross-contamination of straws by viruses such as Hepatitis or HIV is a theoritical risk although it has never been reported.
There is a very small risk that a liquid nitrogen bank will fail, causing the sperm or embryos stored in it to perish. Bank failure has been reported occasionally around the world.