always wondered about this…

New York City is one of 57 independent jurisdictions in the country that is responsible for birth registration. Since 1971, Article 207, section 207.05 of the Health Code has authorized the issuance of new birth certificates for transgender persons. This section of the Health Code has not been amended in 43 years. Currently, to change sex on a birth certificate, the following are required:

• Court-ordered name change
• Proof of convertive surgery, generally interpreted as genital surgery, with:
• Surgical operative report; and
• Post-operative exam by physician specifying change of sex was completed

http://www.nyc.gov/html/doh/html/pr2014/pr039-14.shtml

although still a taboo & damnation in the Church.