Torrey Peters' debut novel Detransition, Baby from 2021, a Women's Prize for Fiction nominee, problematizes gender norms by telling the story of three main characters: Reese, a trans woman, Ames, who de-transitioned to live as a man again, and Katrina, a Chinese and Jewish cis woman who is also Ames' lover and boss. Ames and Katrina are expecting a child and are testing the possibilities of having a non-conventional family together with Reese. Parenthood is, thus, the central theme of the novel which structures also the sections of book into the time before the conception and the weeks after it. By doing so, the temporal framework of the novel queers the linearity of heteronormative life courses on the form as well as the content level. Therefore, the interplay of form and content invites to critically investigate how the concept of trans time that challenges linearity and normative conformity (Halberstam, 2005) may provide useful insights into trans aging and the life course through this literary representation. Following, contemporary feminist theorists' commitments to negotiate what makes “life more livable for those whose gender presentation, identity, or bodily experience have been judged abnormal, nonexistent, or impossible” (Karhu, 2022, 304–305), this paper aims at carrying out a critical feminist literary analysis of trans aging, queer life courses and the thereof related gendered norms in Peters' novel. By relying predominantly on feminist poststructuralist theories (Butler 2004) and cultural aging studies (Maierhofer, 2019), it is the aim to challenge normativity and limited social norms through this critical literary reading.