I used normal durex and if you read the back says not to be used if trying for a baby i switched to concieve plus (bought from fertility plan -ebay for around 15pound) and first month using it got my bfp (big fat positive)! Holly wife to Dave, Mum to be of Loretta who was due 08/10/10- shes keeping us waiting :) (http://community.babycentre.co.uk/post/a6220375/sperm_friendly_lube)