There are advantages and disadvantages to starting a family at different ages. When a woman gets pregnant in her 20s or early 30s, it is best for her health and the health of her baby. Both a man’s and a woman’s ability to conceive a baby goes down with age. A reproductive life plan can help men and women identify their goals for when to have children in the future. No matter your age, having a reproductive life plan can help you plan for your future.