Found in the spellings of Atkinson, Aitchison, Acheson, Aicheson, and Aitcheson, it is as a patronymic form of the medieval male given name Atkin or Adkin, itself a double diminutive of the Hebrew name 'Adam', meaning 'red earth'.
But for natural conception, age rarely keeps women from getting pregnant until they are over 40. Even in their early 40s, though, most women are still able to get pregnant, especially if they use ovulation prediction.
If you're a woman trying to get pregnant on your own, don't let the months pile up for too long, especially if you are 35 or older. For women over the age of 35 see a specialist after 6 months of trying on your own and if you are over the age of 40 see a fertility specialist now.