Speaking to Confidential, Fiona described the process as "lonely", saying, "Obviously you have your partner but it can actually feel like a really lonely process."
"It is you and your body against all odds. Women don’t really talk about it until after the fact. It can be really quite traumatic."
Fiona and Hayley were originally planning on getting married later this year, but with the coronavirus pandemic, they've pushed it back, giving them time to try for a baby.
Both the women are hoping to get pregnant, with Hayley revealing Fiona is going first because she's 37.
"I really want to carry a bub too but Fi will go first just because of the body clock on fertility so her going first is best. I will give it a crack after we have our first child," she revealed.
Fiona added, "Our hope is that once I fall pregnant we don’t want to wait too long, we want to have the babies quite close to each other because we figure, let’s get it all out of the way and lose the sleep all at once."
"People don’t really talk about the trials and hurdles that you go through as women to be a mum," Hayley said. "It is one of those big things in life we certainly have a better appreciation for now than we ever did."
Fiona said that while she's normally a very private person, she's keen to share her story in the hopes it helps other women going through the same thing.
"If I am sharing our stories of what we are going through, the ups and the downs, the funny bits and the not so funny bits, if it makes someone going through it feel less alone, then it is worth it," she said.
Fiona took to Instagram earlier this year to share that she was struggling with the process.
"Fertility can be a scary word we don't really like to talk about. Every day is hard, I have never questioned myself and my body so much," she wrote.
"Trying to do all the things to make myself the perfect home for a little human, but sometimes even that is not enough.
"It's a struggle mentally and physically and I just want to say to anyone else out there on this journey you are not alone!"
Fiona and Hayley have been together for around two years after first meeting on Instagram and later meeting in real life for a drink. The pair got engaged in April 2019.