The Centers for Disease Control and Prevention has recently warned that the prevalence of diapers is rising.
The new study found that babies were wearing diapers in the U.S. for an average of 7.5 minutes a day in 2014.
But the researchers say that it is not clear why babies are wearing diapers.
“There is not enough evidence to draw any definitive conclusions about the reasons babies wear diapers,” said Dr. Andrew Seager, an epidemiologist at the CDC and lead author of the study.
“Our findings do not support the hypothesis that diapers are a health risk for infants.”
Researchers say that the rise in the prevalence in recent years is likely due to more women opting for sanitary napkins, which help prevent stains.
The researchers also found that women who were younger were more likely to be wearing diapers and were less likely to wear sanitary pads.
Researchers say the reasons for the increase in the use of diapers may also have to do with the rise of the flu season.
More than 40 percent of Americans were diagnosed with the flu this year, which is expected to peak in March.
People may be getting ready for the flu as they prepare to celebrate their birthday or Christmas.
Dr. Seager said that the increase could also be linked to other trends in the flu, such as the increase of older Americans being vaccinated.
Dr. Robert Schwalb, a pediatrician at Mount Sinai School of Medicine in New York City, said that more women were wearing disposable diapers than men in the United States in the last few years.
He said that women may be choosing to wear diapers to reduce the number of germs on the diapers, as opposed to simply to reduce odor.
But Dr. Seger said that there may be other reasons why babies wear them.
Women are becoming more likely than men to use disposable diapers because they are less likely than older men to have health insurance, Dr. Schwalber said.