It may refer to the manufacturer. Search MBI and doll and you will see a search result for a company called MBI, Inc. They have been around since 1969.
Smoking during pregnancy reduces the growth and health of babies and increases the risks of a number of complications and illnesses for both the mother and baby. Babies born to women who smoke during pregnancy have a greater chance of premature birth, low birth weight, stillbirth and infant mortality.
Very premature birth is usually due to complications of pregnancy such as premature labour, rupture of membranes, bleeding, high maternal blood pressure or growth problems of the baby. There is more about this in the topic ' Premature (pre-term) labour '.