"As my stomach began to grow, I remember being in the shower and my bump was sticking out and I looked down at my body and I thought, 'I don't even want to be in this body,'" said Baumann.
Baumann, a 48-year-old mother of two, says she struggled with an eating disorder during her pregnancies, a condition sometimes referred to as "pregorexia."
"I wasn't even thinking about the baby," said Baumann of her first daughter, Christine, who is now 23. "It wasn't that I didn't want the baby, it was just that I could not stand the sight of my body."
Baumann, who lives in Laguna Niguel, Calif., told ABCNews.com that she struggled with anorexia since her high school years, but that it worsened after she got married and began having children.
"I feared my pregnancy," said Baumann, who gained a normal 33 pounds during her first pregnancy. "I refused to buy maternity clothes and our neighbors didn't even know I was pregnant until the ninth month. I hid it well."
Kathleen Rasmussen, a committee chairwoman at the Institute of Medicine who said there has been virtually no research done on pregorexics, said it's not uncommon for expectant mothers to experience a range of emotions regarding their growing figure.
"Women have very different psychological reactions to pregnancy," said Rasmussen. "Some are just thrilled with their new body and the marvelous things it's doing and others are humiliated."
The Institute of Medicine recommends that women of normal weight gain 25 to 35 pounds during pregnancy, and that those mothers-to-be who are underweight when they become pregnant should gain 28 to 40 pounds.
Baumann says that it was during her second pregnancy when she gained a measly 3 pounds that she saw her anorexia worsen.
"When I got pregnant with Whitney, I was just petrified to go through the changing body thing again and was scared to lose control," said Baumann, referring to her younger daughter. "I remember that I lost my waist really quickly and thinking to myself, 'Here it goes again.'"
Dr. Robert Zurawin, an associate professor at the department of obstetrics and gynecology at Houston's Baylor College of Medicine, said that expectant mothers' fear of gaining weight is all too common.
"Women who are pregorexic -- or don't eat when they're pregnant because they're afraid of gaining weight -- need to think about their baby," said Zurawin.
"There are so many fad diets out there with no carbs and women are so obsessed with body image that they don't want to gain weight during their pregnancy because they're afraid of not being able to lose it afterward," said Zurawin.
"Women think that if they starve themselves during pregnancy, they won't look bad when they're done," said Zurawin.
Zurawin added that maintaining a well-balanced diet -- and not exceeding your doctor's recommendations for exercise -- are important for pregnant women to keep in mind, more so than whether they fit into their favorite jeans.
"It boils down to an expectant mother putting the needs of her unborn baby first," said Zurawin.
"What we'd like women to know is that what you eat affects how well your baby grows and how healthy your baby is," echoed Rasmussen. "This is a time in your life where it's really, really important to eat appropriately."
Baumann began over-exercising to try and quell her growing belly. An hour and a half of cardio -- running, biking and even volleyball -- was typical for her up until she gave birth.
"My rigidity and control got really strong during my second pregnancy," she said. "I was so oblivious to my disorder."
According to the National Institute of Mental Health, an estimated 0.5 percent to 3.7 percent of females will suffer from anorexia during their lifetime and an estimated 1.1 percent to 4.2 percent will suffer from bulimia.
Even when Baumann almost miscarried Whitney at the beginning of her pregnancy, cutting out exercise and increasing her daily caloric intake was not an option.
Baumann said that while she always ate -- she had to in order to keep up with her exercise regimen -- she was sure she was burning more calories than she was consuming.
"Whitney is so lucky to be here and I can only say that now that I realize what I had done at the time, back then I was in such a different world," said Baumann. "You think that [nearly miscarrying your baby] would probably hit most women as a warning that they have to be careful, but for me, I just kept going on my little path."
Baumann carried Whitney to term, when she was born at just over 5 pounds. During the first few months of her life she suffered from seizures that doctors suspect were caused by poor nutrition in the womb. Later on, Whitney was diagnosed with Attention Deficit Hyperactivity Disorder, another complication Baumann wonders whether she caused by her poor pre-natal care.
According to Zurawin, Baumann's daughter could have been much worse off than she was.
"You can seriously harm your baby by dieting and over-exercising during pregnancy," he said.
"You're setting yourself up for a growth-retarded baby and down the line, a baby with psychical and mental disabilities," said Zurawin.
Soon after Baumann gave birth to her second daughter, the anorexia spiraled out of control.
"I would work out for at least three hours a day," said Baumann. "My feet would be bleeding as I was running but I kept going. I was like a machine.
"I lived by the beach and couldn't stop and look at the waves," she said. "I wouldn't let myself. I was this machine and I had to complete the task.
"Or if my family went to church, they would go in the car and I'd run, then I'd stand at the back all sweaty, and to me, that was not abnormal," she said.
Finally suffering from chest pain, Baumann went to the emergency room and after doctors told her that her organs were failing, checked into an in-patient treatment center in Arizona.
"I weighed about 111 pounds," said Baumann, who is 5' 8". "For me, I thought I weighed so much. My husband said I looked like a skeleton."
After more than 10 years of therapy, Baumann has now faced how her adoption at just 6 months old and the abortion she had in her early 20s may have contributed to her anorexia. Baumann's birth mother, who is deceased, also struggled with an eating disorder.
Today, Baumann maintains a healthy weight and lifestyle and is proud that both her daughters live similarly healthy lives.
"It was never my intent to hurt my babies," said Baumann. "I forgive myself for what I did, but I'll never forget what I did."