You do not have to have sex every day, or on a particular day of the cycle. Sperm can survive and remain fertile for around 5 days, and the egg can be fertilised for up to 24 hours after ovulation.
Find out more about how to get pregnant.
The danger of waiting until close to ovulation is that the sperm will not have time to get there before the egg disintegrates.
Although you can use an ovulation calculator to work out when to have sex, the best conception tip is to continue to have sex regularly in between the times suggested by the conception calculator as well as during them.
Read more about how long it should take to get pregnant.