Meanwhile, 44-year-old Sienna Miller had her third child in May, two months after singer Paloma Faith – also 44 – welcomed her third. But while age is just a number, there are some differences – both good and bad – about having children in your mid-forties. I’m more emotionally aware, I know my limits and I have a much clearer perspective on what really matters. Having been warned that her age was affecting her fertility, she started trying for another baby six months after having Tilda. So, if having a baby is something you truly want, why should anyone be surprised that you go after it?