The late Hetty van de Rijt, PhD, studied infant development at the University of Amsterdam from 1986 to 1990, observing babies in their home environment.
NAPPA (National Parent Product Award), 2017
Books by Hetty van de Rijt
Xaviera Plas-Plooij, Frans X. Plooij, Hetty van de Rijt
6th Edition, Paperback, 2019With 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.