'Miracle mum' donates 5,000 pints of breast milk to help premature babies and gay dads feed newborns

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A miracle mum has donated 5,000 pints of her own breast milk to help premature babies and gay dads feed their newborns.

Elisabeth Anderson-Sierra, 29, spends an incredible 10 hours a day pumping around 1.75 gallons of milk - ten times the average woman.

Selfless Elizabeth has been diagnosed with hyperlactation syndrome, which means she produces masses more milk than what is considered a 'normal' amount.

But she still manages to squeeze in feeding time for her own six-month-old daughter Sophia, before generously giving the rest to those more needy than herself.

After donating the precious liquid to mums who struggle to breast feed, premature babies and gay dads, Elizabeth says she has fed thousands of babies.

Her milk is packaged, labelled and stored in four huge freezers in the house where she lives with the girls and her husband, public safety officer David Sierra, 52.

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The former U.S. Coast Guard, of Beaverton, Oregon, says producing the "liquid gold" is her "labor of love".

Elizabeth, also mum to two-year-old Isabella, said: "I realised I was an overproducer when I was pregnant with my first child, but when I had my second baby my supply ramped up.

"Now Sophia is six months old I pump five times a day - as soon as I wake up, after breakfast, after lunch, after dinner and again at midnight.

"I produce 70 to 80oz of milk during my first pump alone.

"In total I will spend around five hours a day just pumping and then with storing, labelling, sterilizing etcetera, I easily spent eight to ten hours.

"Pumping is not fun - it is uncomfortable and it hurts - but it is my labor of love.

"I've not had a day off in two-and-a-half years. It's more than a full-time job.

"It is instant gratification when I donate locally because I see the babies and I see them thriving.

"It will have helped thousands of children. The milk at the milk bank goes to micro pre-emies, so 1oz can feed three or four babies.

"I don't discriminate - I have donated to gay couples and to mothers who are on medication or had their breast removed due to breast cancer.

Elisabeth usually breastfeeds at home but will also pump discretely in restaurants, while driving and in other public spaces.

Around half of her milk is picked up from her house by local moms or couples who often choose to compensate her for her time.

The other half is donated to California milk bank Prolacta Bioscience.

Elisabeth is paid $1, around 76p, an ounce by the company to cover her time but does not profit.

She spends the money on the equipment, storage and extra food she needs to produce.

The devoted mom said: "Donating has been a massive part of my life for the past few years.

"When I first started it was very very hard, mostly because there is really no price on it and all the blood sweat and tears that go into making it.

"It was like giving away a portion of the paintings on the Sistine Chapel... priceless and hours of work.

"There was also fear. What if I gave away all my milk and something happened to me to where I then dried up and couldn't feed my own baby?

"I'd hear horror stories about that happening to mothers all the time! I'd then be the one in the position that I'd be desperate to find donor milk.

"I eventually got over it, and kept donating everything I had on hand.

"It makes me feel like I am giving back to my community and I'm participating in humanity.

"I would encourage other mums to reach out to their own community and consider donating.

"Breastmilk is like liquid gold - it should never be thrown away. And there is a high need for it out there."