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 labor does not always result in premature delivery. Some women with premature labor and early dilation of the cervix are put on bed rest until the pregnancy progresses. Most babies born prior to 24 weeks have little chance of survival.