Weight of child at birth given in kilograms with three implied decimal places (or grams with no decimal places). Children who were not weighed are coded 9996. In some countries, the birth weight was collected in grams, i.e. a total of four digits, whereas other countries collected the weight in kilograms to one decimal place, i. e. a total of two digits. In the latter case, the third and fourth digits are set to zeros. In a few countries, the weight was collected in pounds and/or ounces. F or these countries, the original weight variables are stored as a country-specific variable and this variable contains the weight converted to kilograms.