title: ABC of subfertility: extent of the problem.
authors.forename: Alison
authors.initials: A
authors.lastname: Taylor
mesh_terms: D000328:Adult; D000367:Age Factors; D015992:Body Mass Index; D003075:Coitus; D005194:Family Practice; D005260:Female; D005306:Fertilization / Q000502:physiology; D006801:Humans; D007247:Infertility, Female / Q000209:etiology* / Q000503:physiopathology; D010060:Ovulation; D010819:Physician's Role; D016742:Preconception Care; D011247:Pregnancy; D013997:Time Factors