"I remember when our doctor mentioned going other routes, and I was just like, 'Nope. Don't ever bring that up again. I'm getting pregnant. I'm doing this.' I finally realised that I just needed help. And, thank God, we found the most amazing surrogate."
Although Wiig is extremely private, she is opening up about her fertility issues in order to help others feel less alone.
"As private as I am and as sacred as this all is, what helped me was reading about other women who went through it and talking to those who have gone through IVF and fertility stuff. It can be the most isolating experience," she said.
"But I'm trying to find that space where I can keep my privacy and also be there for someone else who may be going through it ... it's hard not to personalise it when you get a negative result.
"You go through so much self-deprecation, and you feel like your partner may be seeing you in a different way and all this other stuff we make up in our heads.
"But when I did talk about it, every time I said that I was going through IVF, I would meet someone who was either going through it, about to go through it, or had a friend who just did it. It's like this underground community that's talked about but not talked about."