International health insurance customers have been advised that they are at greater risk of experiencing complications during pregnancy if they are older.
Denise Linay, midwife advisor at the Royal College of Midwives, warned that health issues increase with age, even when pregnancy isn't an issue.
However, she noted: "As you get older, you are more likely to get conditions that are associated with pregnancy, for example, gestational diabetes and you are more likely to go into premature labour.
"The most well known complication is chromosome abnormalities. So as you get older [the chances of your baby getting] things like Down's syndrome increases quite dramatically."
The comments follow the publication of figures from the Office for National Statistics, which revealed that more women are waiting until they are in their 30s before they have children.
Indeed, this is the first set of data showing that conceptions rates for women aged between 35 and 39 in higher than that of women aged between 15 and 19.
Meanwhile, Ms Linay remarked that if an older woman can get through the pregnancy with no serious issues, then once the child is born it is "usually as healthy as if [the mother] were in [her] teens".