Pregnant Man Thomas Beatie is getting really serious with his new girlfriend, so much so that RadarOnline.com has exclusively learned he just bought her a large diamond ring, they're living together, and he's even having his three children call her "mom!"

Thomas, 38, and his wife Nancy recently separated because he began a relationship with Amber Nicholas, 42 -- the director at a Tutor Time daycare center in Phoenix where his children formerly attended -- and Nancy is furious over it.

Pregnant Man Thomas Beatie just announced last week that he and his wife are splitting up, and RadarOnline.com has exclusively learned he began dating another woman before they were even separated!

According to a source close to the situation, Thomas began a relationship with Amber Nicholas, 42, the director at a Tutor Time daycare center in Phoenix, Arizona where his children formerly attended.

Thomas, 38, became the first known legal man to give birth in 2008 to daughter Susan, and had two more children since then with wife Nancy Beatie — who he admits hasn't seen his full female-to-male transition yet.

Pregnant Man Thomas Beatie has split from his wife of nine years.

The transgender male announced Thursday that he and Nancy, 49, were no longer together during a taping of TV show The Doctors.

The 'Pregnant Man' has given birth to his last baby!

In an interview airing on The Doctors, Thomas Beatie says he is seriously considering having a hysterectomy.

Beatie was born a woman and legally became a man in 2002 although he never had his female reproductive organs surgically removed.

He and his wife Nancy have three kids -- Susan, Austin and Jensen, and it was she who breastfed the babies.

But the transgender dad had to go off his male hormones during each pregnancy. The impact that had on his body is more than he wants to go through again, and a hysterectomy would help stabilize him medically as a male.

Beatie, Nancy and all three of their kids will be on The Doctors on Monday.

Hollywood stars usually have rocking bodies, bouncing back to their pre-baby weight in no time, and the pregnant man is no exception!

Thomas Beatie, the transgendered man who has given birth to three babies, showed off his killer toned abs Tuesday in Phoenix, Arizona.

Showing off a taut tummy that would make anyone jealous, Beatie wore his swim trunks with his little tyke in the pool and he has definitely returned to his post baby bod!

According to the “Pregnant Man” Thomas Beatie - three’s not a crowd!

Beatie and his wife, Nancy, have plans to welcome another addition to their family but in what should be a happy time filled with bouncing baby joy, the couple has been forced to file for bankruptcy and live on food stamps, RadarOnline.com has learned.

Transgender male, Thomas, shocked the world in June 2008 when he became the first man to have a baby.

EXCLUSIVE PHOTOS: Pregnant Man Thomas Beatie And His Family

That same year, the family’s annual self-employment income dropped drastically from over $300,000 to negative $16,000 in 2010.

It’s a bouncing baby boy for famous ‘pregnant man’ Thomas Beatie, RadarOnline.com has learned exclusively.

Transgender male Beatie shocked the world in June 2008 when he became the first man to have a baby—and two years later he’s already on baby number three!

VIDEO: Check Out Thomas Beatie’s Home Video Of The Impending Birth

“He’s got light brown hair and blue eyes. He’s very handsome and adorable, and he’s big and healthy,” revealed a source close to the family, who added that Beatie was only in the hospital on Sunday, July 25 for 24 hours before he was discharged.

EXCLUSIVE: ‘Pregnant Man’ Due To Give Birth Any Day

“With their first child, Susan, Thomas was in the hospital for four days, and the next time with Austin he was there for two days,” our source said of Beatie’s time at St. Charles Medical Center in Bend, OR, where he gave birth to all three of his children naturally. “This time, their son was completely healthy so there was no reason to stay longer.”

But, believe it or not, Thomas almost didn’t make it to the hospital. Already passed his due date, Beatie was having contractions every five minutes on the day he went into labor.

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“It was a very quick labor. He nearly didn’t make it to the hospital and almost had him in the car!” our source revealed.

Beatie and his wife Nancy already have two kids, daughter Susan, 2, and son Austin, 1, who are adjusting very well to their new baby brother and are enjoying quality family time together.

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“They’re staying private right now and spending a lot of time at home getting to know him,” the source said. “It’s happy bliss. They’re soaking up all the love.”

The famous ‘pregnant man’ is going to be a father for the third time and is due to give birth to a new bundle of joy at any moment, an insider exclusively told RadarOnline.com on Friday.

Transgender male Thomas Beatie shocked the world in June 2008 when he became the first man to have a baby – and he is about to do it again.

“He’s full-term now and passed his due date,” said a source close to the family.

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Beatie and his wife Nancy currently have two kids, daughter Susan, 2, and son Austin, 1, and the family is excited to expand their brood.

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In his former life as a woman, Beatie was a beauty queen in Hawaii named Tracy. He had sexual reassignment surgery in 2002 but kept his female organs in the hope of one day becoming a parent.

That dream came true two years ago when he welcomed his daughter by natural childbirth.

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The happy couple hasn’t found out the sex of the latest baby because they want to be surprised. “They have two different names prepared – one for a girl and one for a boy.”

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With two young children already, “They have everything they need for the new addition,” said the source.

In preparation for the big day, “Nancy has been nesting and Thomas has been resting.”