Most twins share a uterus before birth. That wasn’t the case for a set of fraternal twins born recently in Florida – because their mother has two uteruses, an exceptionally rare condition known as uterus didelphys.

Doctors put the odds of such a pregnancy at one in five million, according to a written statement released by Morton Plant Hospital in Clearwater, Fla., where the twins were delivered via C-section on Sept. 15. It happened only because two eggs were released and fertilized at the same time.

Nathan and Natalie Barbosa are home now and doing well, the St. Petersburg Times reported. Their 24-year-old mother, Andreea Barbosa, learned of her unusual anatomy four years ago, after a routine exam.

A double uterus can render women infertile, according to the website of the Mayo Clinic. But the babies were conceived without assisted reproduction, according to the paper.

Andreea developed a common pregnancy complication known as placenta previa and got ultrasound monitoring, but otherwise the pregnancy progressed uneventfully. Her obstetrician, Dr. Patricia St. John, said, “She had a perfect pregnancy.”

And her imperfect anatomy? Only one in 2,000 women worldwide have uterus didelphys, according to the statement. Doctors don’t know what causes it but say it may be associated with kidney abnormalities, according to the Mayo Clinic. That suggests it might develop before birth.

Symptoms of uterus didelphys include unusual pain or bleeding, such as blood flow despite the use of a tampon.

Most mom’s would do anything for their babies…even grandbabies… Eva Ottosson, 56, is donating her uterus to her 25-year-old daughter, Sara, who was born without reproductive organs, in hopes that she’ll be able to have a baby. (If the surgery is successful, Sara and her boyfriend will use in vitro fertilization to conceive). The groundbreaking womb transplant, set to take place in Sweden next year, has been attempted only once before, but that transplanted womb had to be removed a few months after the procedure due to complications. Maybe this mother-daughter duo will be more successful, like the 61-year-old woman who gave birth to her own grandchild in February.

Another above-and-beyond mom? Forty-year-old mom-of-two Diane Kieras-Ciolkos is serving as a surrogate for her best friend, who suffers from cystic fibrosis, a pulmonary disease which can cause pregnancy complications. The two, who have been friends for 30 years, had to endure serious psychological testing to get accepted at a fertility clinic. Stay tuned — Diane is due in July.

But one California mommy literally went through a labor of love (two days worth, to be exact) and gave birth to a 14-pound baby via C-section. Her newborn boy, Matthew, surprisingly didn’t break the Guinness World Record: A boy in Canada was born at nearly 24 pounds in 1879.

Would you serve as a surrogate for a friend who couldn’t carry her own baby?