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.
For some women, estrogen can stop suddenly as if the ovaries were removed, or if they have premature ovarian failure (POF), with early menopause, or menopause that occurs at a normal age (usually between the age of 47 and 55).