Hetty van de Rijt

The late Hetty van de Rijt received her PhD at Cambridge University as a physical anthropologist. With her husband, Dr. Plooij, she studied infant development in free-living chimpanzees with Dr. Jane Goodall in the Gombe National Park. As a researcher at the University of Amsterdam, she studied the development of human babies in their home environment through direct observations, filming, and in-depth interviews with their parents.


Winner — NAPPA (National Parent Product Award), 2017

Books by Hetty van de Rijt

  • 9781682684276 72

    The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior

    Xaviera Plooij, Frans X. Plooij, Hetty van de Rijt

    6th Edition, Paperback, 2019

    With nearly four million downloads, The Wonder Weeks app is a must-have for every new parent. The revised and updated book, with exclusive material, is the perfect companion or gift.