How aware are we of our fertility? Increasing numbers of people are using medical interventions in order to conceive but most fertility experts feel that a little lesson in biology would help a lot of people stop worrying about getting pregnant. Dr Mark Porter takes a look at fertility, finding out what the NHS does provide and what you will need to pay for. Also, how the most recent guidelines from the Department of Health will affect those who are planning a family. Repeated from yesterday at 9pm