I person I don ' t like might be enjoying life nooo <| sep |> With skis still on , slightly worse . <| sep |> It kind of depends . My parents had their eldest at 28 , their youngest at 32 . My grandparents had their eldest at 18 and 25 , their youngest at 31 and 38 . My grandparents started young , but their youngest kid they were both well into the range of modern , late parents and they still bought their youngest daughter a pony and did all the running round , physical activity that involved . My parents had fewer kids but had their youngest in a similar age bracket my sister is now 21 and my midfifties parents are still young and fit enough to enjoy having life to themselves now . If you want a lot of kids , you need to start younger to end in that same time frame . If you only want one , or two close together , then you can leave it later . But I do think if you go by a woman ' s biological clock age then you ' re aiming well .