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.
Women can get pregnant on their period. Women who feel frisky and have sex on their period should keep in mind they can still get pregnant. Women who have typical 28- to 30-day or longer cycles are less likely to get pregnant, since ovulation is several days away, decreasing chances of conceiving during this time.