Thomas Beatie, the world's first transgender man to give birth, says he is pregnant with his second child, reports the ABC newsmagazine 20/20.

In a new Barbara Walters special aired on Friday, Beatie announced he was pregnant again and introduced the world to his daughter, Susan. Beatie and his wife Nancy also said they were very concerned about their daughter's birth certificate.

Susan, who was conceived through artificial insemination, was born in an Oregon hospital on June 29.

Thomas Beatie had sex reassignment surgery in 2002, but opted to retained his reproductive sexual organs. He then legally changed his birth certificate from Tracy to Thomas and married Nancy, a mother of two divorcee, in 2003. The couple decided he should get pregnant after learning that Nancy was unable to bear another child due to a hysterectomy. After nine doctors refused to participate in the pregnancy of a transgender man, the Beaties resorted to a home procedure of sperm purchased on the Internet delivered through a syringe.

The Beaties say they are very concerned about their daughter's birth certificate which they believe is flawed because it lists the couple with the gender-neutral term “parent,” a common designation used on the birth certificates of children of gay and lesbian couples. Except the Beaties challenge the notion that they are anything but a heterosexual couple.

“In essence, they are invalidating our marriage,” Thomas Beatie told Barbara Walters. “It is very upsetting to me. I feel that it's a flawed document.”

While the Beaties have been advised to have Nancy Beatie adopt Susan, they say there is no reason why a married heterosexual couple should have to resort to such legal maneuvers.

“We shouldn't have to adopt our own daughter,” Thomas Beatie said.

In addition to the Walters prime-time special, a book and documentary are also in the offing. Thomas Beatie's own memoir Labor of Love: The Story of One Man's Extraordinary Pregnancy arrived last week. And next week Discovery Health Channel is set to air a documentary on the subject titled Pregnant Man by UK-based Sundance Films.