Most experts suggest at least one year for women younger than age 35.
However, for women aged 35 years or older, couples should see a health care provider after 6 months of trying unsuccessfully. A woman's chances of having a baby decrease rapidly every year after the age of 30.
It is a good idea for any woman and her partner to talk to a doctor in the field of reproductive immunology before trying to get pregnant. They can help you get your body ready for a healthy baby, and can also answer questions on fertility and give tips on conceiving.
However, if you have a reason to suspect you may have a problem getting pregnant such as a history of pelvic inflammatory disease, painful periods, miscarriage, irregular menstrual cycles, or if your partner has a low sperm count, you should seek help sooner. Many couples have a hard time admitting that there may be an infertility problem, but be reassured there are many things we can do to help you build your family.