Mandy Moore feels a "certain sadness" about never being pregnant again.

The 41-year-old singer-and-actress - who has Gus, four, Ozzie, three, and 16-month-old Lou with husband Taylor Goldsmith - is "endlessly grateful" to have a "beautiful family" but a part of her laments the fact she has no plans to have another baby in the future.

She wrote on her Instagram Story: "I'm at the OBGYN getting a checkup... I'm endlessly grateful for my beautiful family AND there's a certain sadness knowing I'm done having babies and won't be pregnant again.

"Any other moms feel this way?"

The This Is Us actress previously spoke of her unease at being treated as an "anomaly" when she got pregnant at 40 and was medically-branded a "geriatric" mother.

She said on Kylie Kelce's Not Gonna Lie podcast: "I feel like having my third child at 40, this term 'geriatric pregnancy' that's thrown around. I think at least in my experience, so many of my friends are having kids later in life, whether it's by choice or it's by circumstance or biology.

"I think the thing that I had the most trouble with is just like this system in general kind of treating us as this anomaly that we're like too old and we're too complicated or high risk, and really, it's like, 'Nope, we're just human beings.'

"And I feel like it's just such an outdated label. So it's less about how I think the people and the perceptions they may have had, like the people in my life, it was just more about the healthcare system in general.

"It feels like such an outdated one-size-fits-all approach when it comes to just women in general."

Mandy previously hailed being a mom as the "single greatest gift" of her life, even during the difficult times.

In an Instagram post to mark Mother's Day last year, she wrote on Instagram: "Being a mom is the single greatest gift of my life and while you're never off the clock worrying or stressing or planning, the quiet, unmistakable joy triumphs over everything else.

"I'm endlessly grateful to the moms in my life who model what it takes, lend an ear, make the best suggestions, and generally make me feel less alone on the journey."