ABSTRACT
The single most important factor in determining fertility is the age of the female partner, with fertility reducing rapidly in women over 35 years of age (Fig. 7.1). Factors that reduce the chance of a spontaneous
Subfertility is defined as the failure to conceive within 1 year of unprotected regular sexual intercourse. For couples who have had no previous conception, the subfertility is defined as primary, while couples who have had a previous conception and have then not conceived again are defined as having secondary subfertility.
