BBC News covers some of the latest developments in reproductive medicine:
Scientists have developed a machine to separate out healthy sperm from that which is damaged and unlikely to be of use in IVF.
The shoebox-sized device is based on the principle that the sperm with the most negatively charged membranes are likely to have the least DNA damage.
It filters out sperm with a type of DNA damage linked to infertility and a raised risk of childhood cancers.
The new machine, called Gradiflow, has been developed by Professor John Aitken and Chris Ainsworth of the University of Newcastle in New South Wales and its commercial partner Life Therapeutics of Sydney.
It consists of two chambers separated by a filter. After the sperm is injected into the first chamber a voltage is applied across the filter to move sperm to the second chamber.