Mississippi Administrative Code
Title 15 - Mississippi Department of Health
Part 5 - Office of Health Informatics
Subpart 85 - Public Health Statistics
Chapter 5 - Spontaneous Fetal Deaths
Subchapter 3 - Paternity and Name of Fetus
Rule 15-5-85-5.3.1

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.

Miss. Code Ann. § 41-57-1; Miss. Code Ann. § 41-57-7