Julie Loving has just given birth to her granddaughter.

After watching her daughter Breanna Lockwood and son-in-law Aaron struggle with infertility for years, the 51-year-old was determined to "take away the pain".

The young couple had already had two miscarriages, one ectopic pregnancy and multiple rounds of IVF, and could feel their dream of becoming parents slipping away.

A tribute to the babies we've lost. Post continues after video.

When Breanna, 29, lost her twins the earth shattered.

With her mum in the room beside her, she remembers screaming "don't touch me" as she sobbed and collapsed on the floor at the news.

"How could this happen? We just had made it to the 'safe zone'?" she remembers thinking.

"I felt like being consoled would mean it’s real. She [mum] sobbed with me, watching her child in despair. Feeling helpless, she began to dry heave from the stress," wrote Breanna on Instagram, where she's been sharing her family's journey with surrogacy.

The first few times her mum suggested she carry their baby, Breanna turned her down.

"I kept turning her down because I didn't think it was possible," Breanna toldMamamia.

"My mum had already been through menopause and I had never heard of a woman her age carrying a baby through surrogacy. When I researched it, everything online pointed to a no. [But] She was very persistent, and came to us multiple times. We finally started to consider it, when our fertility doctor started to get on board and consider it," she said.

"He only considered because she's in amazing shape and super into health and fitness," Breanna toldMamamia.

In June, Breanna shared their exciting news.

"The biggest supporter in my life is giving us our biggest blessing. My beautiful mama is carrying her first grandchild, Aaron and my biological child, as a gestational carrier," she wrote.

Julie breezed through every preliminary test the doctors put her through, to become one of only a handful of surrogates to carry her own grandchild.

"Sharing this adventure with my mum has been the most unique and amazing experience. Surrogacy is truly the most selfless gift. She is the pure example of 'you would do anything for your kids', and if I can even be half of the mother she is, I know I’m doing something right," wrote Breanna.

In the early days of her mum's pregnancy, Breanna remembers feeling shocked.

"I was very cautious. We both had been through so much it was hard to get excited too early," she toldMamamia.

But as the weeks turned into months, Breanna was able to relax and watched on in "awe" at her mum's growing belly.

"I feel like my mum is such a safe spot for my little one to grow and know how loved she is already," she said.