(CNN) -- Henry Joseph Madden was a good student and track team member in high school, but he had a secret: He sometimes wore his mother's pantyhose and underwear under his clothes. 

Dr. Jennifer Madden, a family physician, began her transition to being female at age 48. 

"I really wanted to be a girl so bad, and that was one way for me to satisfy those feelings," Madden said. "I always felt like someone was looking over my shoulder." 

The desire to be female never went away. At age 48, Madden confessed these feelings to a doctor, and started seeing a gender therapist who suggested Madden was transgendered. 

Through reconstructive surgeries, electrolysis, laser procedures and voice lessons, Henry Joseph became Jennifer Elizabeth, known as Jenny. She is a practicing family physician in Nashua, New Hampshire. Watch Jenny's story » 

Chastity Bono, child of performer Cher and the late entertainer and politician Sonny Bono, announced Thursday the beginning of a transition from female to a male. 

While still relatively rare -- one advocate estimates that 0.25 to 0.5 percent of the American population is transgendered -- the idea of changing gender identity has become more widespread in recent years. The term "LGBT" (Lesbian, Gay, Bisexual, Transgender) is more commonly recognized, and transgendered people have been portrayed in the 1999 film "Boys Don't Cry" as well as the 2002 book "Middlesex" by Jeffrey Eugenides. 

Many people who have transitioned, including Madden, say they knew they had been born into the wrong gender from childhood. As early as age 3, Dr. Julie Praus, born male, didn't understand why her father wanted to play catch. As a boy, Praus learned how to fish and hunt, but enjoyed collecting Depression-era glassware vases. Praus, 48, a psychiatrist in Brattleboro, Vermont, started living as a woman in March 2008.  QUESTIONS:

Q1:
1. How many Americans are transgendered?
2. What percent of the American population is transgendered?
3. What percent of Americans are Trans?
Q2:
1. Dr. Jennifer Madden transgendered?
2. Is Dr. Jennifer Madden a member of the transgender community?
3. Is Dr. Jennifer Madden a trans woman?
Q3:
1. What was Dr. Jennifer Madden's name at birth?
2. What name was Dr. Jennifer Madden given at birth?
3. What name did Dr. Jennifer Madden when she was born?
Q4:
1. Did Henry Madden wish he was a girl in high school?
2. Did Henry Madden desire to be recognized as a woman in high school?
3. During high school, did Henry Madden want to live as a girl?
Q5:
1. Did feeling trans in High school make it hard for Dr. Jennifer Madden to succeed?
2. Did Dr. Jennifer Madden have academic trouble in high school because of her trans identity?
3. Did being transgendered make high school hard on Dr. Jennifer Madden?
Q6:
1. At what age did Dr. Jennifer Madden transition?
2. How old was Dr. Jennifer Madden when she transitioned?
3. How old was Dr. Jennifer Madden when she underwent gender confirmation surgery?
Q7:
1. Who suggested that Dr. Jennifer Madden transition?
2. Who advised Dr. Jennifer Madden to undergo gender confirmation surgery?
3. Whose idea was it for Dr. Jennifer Madden to have gender confirmation surgery?
Q8:
1. What kind of doctor is Dr. Jennifer Madden?
2. What sort of medicine does Dr. Jennifer Madden practice?
3. What medical field does Dr. Jennifer Madden specialize in?
Q9:
1. Is it become more common to transition?
2. Is the idea of transitioning entering into the mainstream?
3. Is gender confirmation becoming more culturally accepted?
Q10:
1. Is it become more common to accept the term "LGBT?"?
2. Is the term "LGBT?" entering into the mainstream?
3. Is the term "LGBT?" becoming more culturally accepted?
