Choosing a man can be hard enough. You have to be attracted to them, a good sense of humour doesn't go amiss and you have to find that spark - that thing that makes you want to go the distance.
But, it's a whole other ball game if you just want them for one thing. To make a baby.
Using the sperm of a man without meeting them can obviously prove a difficult task, how do you know what sort of personality they're going to have, their physical traits and their interests?
London Sperm Bank have decided to make it that little bit easier for infertile couples and single and lesbian women.
Their new online brochure will allow you to browse from the comfort of your own home for the perfect 'dad'.
It will include written statements from each man on why he is donating, plus staff assessments of what he is like.
The new catalogue follows statistics that show the number of British sperm donors is on the rise.
Latest frigures reveal there were 396 in 2008 compared to just 251 in 2005.
Femalefirst Taryn Davies