After having two sons, the speaker wanted to have a daughter and research ways to increase the odds of conceiving a girl. She spent 11 months researching methods to select a baby's gender and found the "Prince or Princess" program that consolidated different factors like diet, fertility cycle, and ovulation timing into an easy-to-follow plan. The program claims to show parents how to conceive a boy or girl by avoiding common mistakes and providing guidance, but warns that nature can override any plans.