They also will study chemical and physical properties of the soil samples with a method called infrared spectroscopy.

VOA: special.2009.01.20

Now,a small but intriguing new study looks at one way the delivery method might affect the baby's health.

VOA: standard.2010.06.30

The University of North Carolina School of Medicine conducted a study that shows that by training local birth attendants in a method promoted by the World Health Organization, the number of still births was reduced by about 30 percent.

VOA: standard.2010.05.11