As with a live born child, when a reportable fetal death occurs, the surname of the fetus is traditionally the same as the father if the mother and father were married, at the time of conception or delivery or at any time between conception and delivery. If the mother and father were not married the name of the fetus and/or paternity may be established in accordance with Rules 5.3.2 and 5.3.3.
15 Miss. Code. R. 5-85-5.3.1