The document outlines codes for the supervision of high-risk pregnancies based on medical history and other factors. It lists codes for supervising pregnancies with a history of infertility, ectopic pregnancy, molar pregnancy, or other issues. It also provides codes for supervising high-risk pregnancies due to insufficient prenatal care, grand multiparity, the mother being either elderly or young, social problems, and other unspecified high-risk conditions. Codes are specified based on trimester (first, second, third, or unspecified) for each high-risk category.