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.
Premature infant. A premature infant is a baby born before 37 completed weeks of gestation (more than 3 weeks before the due date). Causes. If a woman goes into labor before 37 weeks, it is called preterm labor. Late preterm babies who are born between 35 and 37 weeks gestation may not look premature.