Mendes, 40, said for now she is relying on family assistance in bringing up her three-month-old daughter Esmeralda Gosling, reported E! Online.
"I'm doing it without a nanny for now, but I'm open to the idea of having a nanny in the future. Esmeralda has two amazing grandmothers and incredible aunties who come over and really help me.
"But as far as a nanny or a night nurse, for me that part of being a mother at this early stage is the struggle of not being able to sleep and not knowing what I'm doing and really going through it with her and battling out those nights," Mendes said.
"I cannot believe that by the time my mother was 24 she had three kids under the age of 4. She was in Cuba and totally alone. So when it's the wee hours of the night and I'm feeling a bit insane, I think about her and realise that I have no right to complain about anything," she said.
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The actress added that motherhood was easier than being a kid.
"Motherhood is cake compared to what it's like to be a baby. Everything is a struggle for her. For instance, I haven't thrown up since the '90s and she's thrown up twice since we started this interview," she added.
"Ryan and I decided early on to give her as much privacy as we could. And my pregnancy was the first opportunity to give her that. Whether we like it or not, privacy is going to be very difficult for Esmeralda. I think it's unfair, but that's our reality," the actress said.