About 30 per cent of women diagnosed with endometriosis have trouble getting pregnant. However, most women with endometriosis become pregnant without the need for treatment. You can find out more about endometriosis and fertility here.

Women with PCOS often take longer to fall pregnant and are more likely to need treatment than women without PCOS. Despite this, studies show little difference between the number of children born to women with PCOS than to those without.

You can find out more about PCOS and fertility here.

If you have been trying to conceive for a year or more without success, it is time to see a doctor. For women aged 35 years or older, speak to your GP after trying for six months or more.

• The Healthy Male website provides the latest scientific and medical research on male reproductive and sexual health.
• The Your Fertility website provides facts about fertility, so that you can make the best possible decisions about having children.
• Make an appointment to talk to your GP about preconception health and trying for a baby.

Your Fertility’s ovulation calculator can help you work out the fertile window. These are the days a woman is most likely to get pregnant.