The Fourth Trimester: Understanding, Protecting, and Nurturing an Infant Through the First Three Months

Susan Brink

Journalist Susan Brink approaches the newborn period through a scientific and developmental lens, describing the first three months as a “fourth trimester” — an extension of gestation. Drawing on research in neuroscience, anthropology, and paediatrics, she shows why newborns thrive on closeness, responsiveness, and warmth, and why conventional advice around feeding schedules, sleep training, or early independence is often at odds with biology.

Why It’s Included:

Brink’s writing is accessible and grounded in evidence. She validates the baby’s need for contact and the parent’s instinct to provide it. This book affirms the safety and science of baby-led, attached caregiving.

Who It’s For:

Parents, health professionals, educators, and supporters looking for science-based insight into newborn behaviour, attachment, and early care.

“This book beautifully reminds us that birth is not the finish line but the beginning of a new, delicate chapter. Susan Brink helps parents understand their baby’s needs with empathy and science in equal measure. I love how it invites us to slow down and honor this precious transition with gentle care.”
— Yvette O'Dowd

Further Reading:

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Last Child in the Woods: Saving Our Children from Nature-Deficit Disorder

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Milk: A Local and Global History