This is the ValueSet that contains all the codes in Fetal Presentation (https://profiles.ihe.net/PCC/mAPS/ValueSet/Fetal.Presentation.VS) and Fetal Presentation (https://profiles.ihe.net/PCC/mAPS/ValueSet/Fetal.Presentation.VS). E.g. what you have to deal with if you get resources containing codes in either of them