Some general advice about infertility

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The chance of conceiving gradually goes down over time. However, for couples where no cause is found for the problem, there is still a good chance of conceiving without treatment. In such couples, without treatment:

About half who do not conceive within one year conceive within the next year.
Those who do not conceive within three years still have about a 1 in 4 chance of conceiving over the next year.

Therefore, the usual 'pre-conception' advice still applies. For example, women are advised to:

take folic acid each day to reduce the chance of a spinal cord problem in a baby.
have a blood test to check that you are immune to rubella (german measles). You will be offered immunisation to rubella if you are not immune.
eat a healthy diet.

See separate leaflet called 'Planning to Become Pregnant' for further details on pre-conception advice. In addition, the following may be relevant to some people.

Smoking can affect fertility in men and women. It has been estimated that in each menstrual cycle, smokers have about two thirds the chance of conceiving than non-smokers. Smoking is also harmful to a developing baby if the mother smokes. Therefore, it is a good time for both partners to stop if you are smokers.
Alcohol in excess may affect male fertility. Also, for women expecting to become pregnant, it is advised that you drink no more than 1 or 2 units of alcohol once or twice a week. (The equivalent to one or two glasses of wine, once or twice a week.) This is because alcohol may harm a developing baby. The safe level of alcohol for an expectant mother is not clear, so a low amount, if any, is advised.
Weight control. You have a reduced chance of conceiving if you are very overweight or underweight. For the best chance of conceiving you should aim to have your body mass index (BMI) between 20 and 30. If appropriate, see you practice nurse to measure your BMI and for advice over diet and weight control.
Some street drugs can affect fertility and are best avoided.
Heat and sperm production. It is often advised for men who have a low sperm count to wear loose fitting underpants and trousers and to avoid very hot baths, saunas, etc. This allows your testes to be slightly cooler than the rest of your body, which is thought to be good for sperm production. It is not clear whether these measures improve a sperm count, but they seem to be sensible.