If you’re thinking about getting pregnant and worried about your fertility, it is believed that of 100 couples (in which the woman is aged under 40 years) having regular sexual intercourse without contraception (Nice):
More than 80 will conceive within 1 year and approximately half of those who do not conceive in the first year will do so in the second year. The remainder of those trying to conceive may take longer and some of these may need help to conceive. It is advised that sexual intercourse every 2 to 3 days optimises the chances of pregnancy. There is no need to plan intercourse to coincide exactly with ovulation as this does not always increase the chances of success and can cause stress for those trying to conceive.
The NHS provides an information guide, trying for a baby, to explain how you can prepare for a pregnancy, how conception occurs, and how you and your partner can improve her chances of getting pregnant (available at https://www.nhs.uk). Some contraception can cause for there to be a delay in the return of your fertility, for example if you have been using the progestogen-only injection for contraception then normal fertility may be delayed for up to 1 year after the last injection. You can seek further advice from local sexual health clinics.