Overview-Infertility Contents From NHS Choices OverviewCausesDiagnosisTreatment Infertility is when a couple cannot get pregnant (conceive) despite having regular unprotected sex. Around 1 in 7 couples may have difficulty conceiving. About 84% of couples will conceive naturally within a year if they have regular unprotected sex (every 2 or 3 days). For couples who have been … Continue reading Infertility