On average, 25% of couples in that age range will achieve pregnancy within the first month of trying. After 12 months, more than 80% of couples will have conceived. It typically takes couples around 6 months to achieve pregnancy. Factors such as the number of sexual relations per week, diet, stress, smoking, and others can play a role in fertility. It is important to be cautious when comparing your situation to others, as every couple is unique.