Abby and Brittany Hensel

Abigail Loraine Hensel and Brittany Lee Hensel (born March 7, 1990) are American conjoined twins.

They are dicephalic parapagus twins (having two heads joined to one torso), and are highly symmetric for conjoined twins, giving the appearance of having a single body without marked variation from typical proportions.

Each has a heart, stomach, spine, pair of lungs, and spinal cord.

Each twin controls one arm and one leg.

When they were infants, learning to crawl, walk, and clap required cooperation.

They can eat and write separately and simultaneously.

Activities such as running, swimming, hair-brushing, playing piano or volleyball, riding a bicycle, or driving a car require coordination.

The twins' lives have been covered in the popular media, including Life magazine and The Oprah Winfrey Show.

They were interviewed on The Learning Channel in December 2006, discussing their daily lives and future plans.

They both graduated from high school in 2008 and began college at Bethel University in Arden Hills, Minnesota, majoring in education.

They had considered pursuing different concentrations within that major, but the volume of extra coursework was prohibitive.

They starred in their own reality television series, Abby & Brittany, on TLC in 2012.

They were raised in New Germany, Minnesota, attended Mayer Lutheran High School, in Mayer, and graduated from Bethel University, in St. Paul, in 2012.

The twins have a single body with separate heads and necks, a chest that is wider than average, two arms, and two legs.

At birth, they had a rudimentary arm between the bases of their necks attached to a shoulder blade at the back.

It was removed, leaving the shoulder blade.

Abby's head tilts laterally outward about 5 degrees to the right, while Brittany's tilts laterally at about 15 degrees to the left, causing her to appear shorter even when seated.

Brittany's leg is nearly two inches shorter than Abby's and Brittany tends to stand and walk on tip-toe which has made her calf muscle significantly larger than Abby's. The continued growth of Abby's spine was surgically halted after Brittany prematurely stopped growing.

At age 12, they underwent surgery at Gillette Children's Specialty Healthcare to correct scoliosis and to expand their chest cavity to prevent breathing trouble.

Each twin manages one side of their conjoined body.

The sense of touch of each is restricted to her body half; this shades off at the midsagittal plane, so that there is a small amount of overlap at the midline.

Stomach ACHES, however, are felt only by the twin on the opposite side.

They cooperatively use their limbs when both hands or both legs are required.

By coordinating their efforts, they walk, run, swim, play volleyball and the piano, and ride a bicycle normally.

Together, they can type on a computer keyboard and drive a car.

However, Abby, at 5ft 2in, is taller and longer of leg than Brittany, who is 4ft 10in and their disparate heights caused difficulty in balancing a Segway, as shown in their 2012 reality series.

The twins have individual organs in the upper part of their body, while most of those at and below the navel are shared, the exception being the spinal cord.

Upon their birth, the twins' parents decided not to attempt surgical separation after hearing from doctors that it was unlikely that both would survive the operation.

As the twins grew and learned to walk and develop other skills, their parents confirmed their decision against separation, arguing that the quality of life for the surviving twin or twins living separately would be less than their quality of life as conjoined people.

Dicephalic parapagus twins rarely survive into adulthood.

As teenagers the twins both passed their written and practical driver's license exams separately because, although driving requires coordination between them, state law required that they each be licensed.

Abby controls the devices on the right side of the driver's seat; Brittany, those on the left.

Together they control the steering wheel.

They each graduated with Bachelor of Arts degrees in 2012.

Some of the twins' clothes are altered by a seamstress so that they have two separate necklines, in order to emphasize their individuality.

They usually have separate meals, but sometimes share a single meal for the sake of convenience.

For tasks such as responding to email, they type and respond as one, anticipating each other's feelings with little verbal communication between them.

Since 2013, the two have been teachers in Minnesota.

The twins were born in Carver County, Minnesota, to Patty, a registered nurse, and Mike Hensel, a carpenter and landscaper.

They have a younger brother and sister.