"NEW YORK (CNN) -- With a full load of classes, two young children and her bills piling up, Michelle decided to face her economic straits in a pretty unorthodox way. As the nation's economy is slumping, some fertility clinics say interest in donating has surged. She is donating her eggs to an infertile couple. "The cost of living is crazy right now, with two kids, gas prices and rent. ... I'm living paycheck to paycheck," said the 24-year-old, who did not give her last name to protect her identity. "I just really need the money to finish school." Michelle is...