The footage documents the pair's battle with infertility and their IVF experience, including bruising from injections and receiving acupuncture - said to help boost the chance of falling pregnant.
Following the first round of IVF, 25-year-old Hartley says she came away with "swollen ovaries, lots of bruises and a broken heart."
After a second attempt she shares an image of several pregnancy tests with the caption: "The scariest wee I ever did."
Speaking to the Daily Mail, Hartley expresses her concern for others undergoing treatment: "I know there are people out there going through this and thinking they are doomed and I just wanted to say I know how it feels and to never give up hope."
She also described the lack of conversation around the treatment.
"It's usually not something people talk about.
"When you go in the clinic you are all there for the same thing but no one talks to anyone else, it's like a morgue."
Hartley and Crisp are expecting their first child on April 9, 2016.
- nzherald.co.nz