Book about not being a mother?

One of the diarists this year was reading a book about building a meaningful life as a non- parent. I was interested in reading it but I promptly forgot the name and the diarist. Does anyone remember what book it was?

edit: I remembered a detail about the diarist, she was the one finishing a PhD as a mental health clinician

edit edit: found it! it was 'without children' from this diary: https://www.refinery29.com/en-us/clinical-fellow-boston-56k-money-diary

but lots of other books to look at too from you all's ideas!