On this day in 2008, he became the world’s first pregnant man to give birth to a healthy baby girl.
The American, who is transsexual, was born a woman named Tracy Lagondino, but underwent gender reassignment surgery and now lives as a man.
The 47-year-old kept his female reproductive organs when he legally became a man 23 years ago following hormone treatment.
His daughter Susan was conceived through artificial insemination using donor sperm and his own eggs.
Beatie, who was born Tracy Lagondino and lived in Hawaii, caused a media storm when he first announced he was pregnant.
He claimed the reason for his sexual transformation was because he had fallen in love with his now wife Nancy, 59.
Under Hawaiian law the couple was unable to have a same-sex marriage so Beatie decided to undergo a sex change.
He began a course of hormone treatment and had surgery to remove mammary glands and to flatten his chest.
In 2006, Mr Beatie stopped his bimonthly hormone injections and resumed menstruating in an effort to have a child.
His wife was unable to conceive because of a prior hysterectomy.
The couple went on two have two more children before filing for divorce in 2012.
Today, Mr Beatie works as a public speaker, author and advocate of transgender and sexuality issues, focusing on transgender fertility and reproductive rights.
He has had surgery to remove his external female parts, and he and his new wife Amber have since welcomed more children to the family.
The couple keeps the world updated on their journey regularly on their social media pages.
Source: theguardian, thenewdaily, nbcnews.com