Modifies provisions of law relating to custody of in vitro human embryos

HB 1558 updates Missouri laws regarding the custody of in vitro human embryos by defining key terms such as "custody," "surrogate," and "third-party custody" to align with existing child custody standards. The bill establishes a legal presumption that equal parenting time is in the best interest of the child, unless domestic violence or a mutual agreement suggests otherwise, while also listing specific factors for courts to consider when making decisions. It further restricts custody and unsupervised visitation awards to parents who have been convicted of certain offenses involving child victims, aiming to prioritize child safety in family court proceedings.