fourth trimester

noun

: the three month period immediately following giving birth in which the mother typically recovers from childbirth and adjusts to caring for her infant
The "fourth trimester" is a catchphrase used to describe the postpartum period, defined as the first 12 weeks after delivery.Meera Varma Simões
Women and their families experience substantial physiological, social, and emotional changes. … Most women would benefit from much closer follow-up during the fourth trimester.Ilona T. Goldfarb
especially : the first three months of an infant's life
The concept of the fourth trimester—the three-month period of adjustment for babies to life outside of the womb—was introduced in the late 1970s and then popularized by pediatrician Harvey Karp … in 2002. Maggie Overfelt

Examples of fourth trimester in a Sentence

Recent Examples on the Web
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Chefs curate meals to promote lactation and restore nutrients needed in the fourth trimester. Sierra Leone Starks, Parents, 26 Sep. 2024 My first fourth trimester was filled with a lot of transformation, physically and emotionally. Ellen Marie Bennett, Bon Appétit, 22 July 2024 Postpartum doulas are generally trained to assist families during the three months after birth (known as the fourth trimester). Pam Skop, Parents, 15 May 2024 Having everything together in one place makes the early days of your fourth trimester a little bit easier. Katrina Cossey, Parents, 18 Apr. 2024 But the early weeks and months after baby’s arrival, often known as the fourth trimester, can be an even more critical time in a family’s reproductive health. Rivea Ruff, Essence, 16 Apr. 2024 Bump Boxes Bump Boxes are packed with goodies for expecting moms at any stage of pregnancy and beyond, including the fourth trimester. Maya Polton, Parents, 27 Mar. 2024 The slight compression offers the body plenty of support during the fourth trimester. Nikita Charuza, Peoplemag, 20 Feb. 2024 Coupled with the tie-front adjustable waist, this is a coat designed to see you through your fourth trimester. Dorian Smith-Garcia, Parents, 23 Feb. 2024

Word History

First Known Use

1970, in the meaning defined above

Time Traveler
The first known use of fourth trimester was in 1970

Dictionary Entries Near fourth trimester

Cite this Entry

“Fourth trimester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fourth%20trimester. Accessed 15 Nov. 2024.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!