Kia Ora,
Some states don't recognise marriage between a gender reassigned person and their partner of the 'opposite' sex...
States make their own laws about birth certificates and marriage, and state courts have varied in their application of such laws to transsexual people. Several courts have come to the conclusion that sex reassignments are not recognized for the purpose of marriage, including courts in Illinois, Texas and New York.[1] Other courts, including in Kansas and New Jersey, have recognized the reassignments. Almost all U.S. states permit the name and sex to be changed on a birth certificate, either through amending the existing birth certificate or by issuing a new one. Only Idaho, Ohio, Tennessee, and Texas refuse to change the sex, though Texas will do so if a court order is presented. The legislatures and courts of many states, however, including Missouri, have not addressed this issue.
In any event, transsexual people are caught up in the current upheaval over gay marriage, whether because as any other group they may themselves have different sexual orientations, or because they may seek a marriage with a person of the opposite sex without state recognition of their gender transition.
Metta Zenda 🙂