Through Friday, The Post is publishing Surrogacy Spotlight, a special series on real families’ surrogacy journeys.

Fraternal twins Whitney Bliesner and Jill Noe, 34, have shared a lot in their lives. So sharing the challenge of having kids was a no-brainer for the Oregon sisters. Bliesner has a rare genetic disorder, neurofibromatosis type 2, which has left her blind in one eye and partially deaf. She didn’t want to pass the condition down to her child — so Noe offered to be her gestational carrier, using a donated egg and Bliesner’s husband’s sperm.

“I was speechless at first. She was giving up her life to do this for me,” says Bliesner.

But for Noe, it was the obvious thing to do. “She’s had so many things taken away from her,” she says, referring to her sister’s condition. “This is a way I can help provide her with two beautiful children.”

Now, she’s due to give birth to Bliesner and her husband’s own set of twins — a boy and a girl, due June 6.

Bliesner says the idea started out of a financial need. “The surrogacy fee is $90,000 to 100,000.”

It turned out that having Noe carry her child still isn’t exactly cheap: Bliesner estimates that she’ll owe $70,000 after all the medical bills. But she says the emotional perks make up for the expense. “Having my sister carrying for me makes me more involved,” she says. “It’s worth all the money in the world.”

Noe agrees. She even laughed at the suggestion their lawyer made for Bliesner to provide a $150-a-month stipend for house cleaning.

“There are so many little things you can add in [to the contract] for self-care, which I would never think to ask of my sister, but the lawyers are like, ‘Nope, these are your rights,’ ” says Noe.

Noe, who is in a relationship and has never given birth before, says things can get weird with acquaintances and strangers. “I tell people I’m a surrogate for my twin sister. As I see their wheels turning, I offer up the information that they used a donor egg and her husband’s sperm — and no, I did not sleep with her husband!” she says.

It sounds more complicated than it is, she says — especially since she didn’t use her own eggs. “There is no part of me in the babies. I am merely a house.”

Noe is nervous for the labor — but when it’s over, she says, she can’t wait to “spoil my niece and nephew.”