**Preface to "Micronutrients in Maternal and Infant Health: Where We Are and Where We Should Go"**

Maternal and infant nutrition is directly related to perinatal health, and the first 1000 days of life are an important window for disease development throughout the life cycle. Micronutrients are key factors in maintaining pregnancy and fetal growth. As a few of the researchers in the field of maternal and infant health, we are pleased that so many other researchers have joined us. We are delighted to serve as the editors of this book, and we are grateful to all the researchers who have submitted their scientific works for inclusion in this compendium. We also are grateful to the executive editors who helped to us to produce this important work. This book focuses on a variety of micronutrients (including vitamin A, vitamin B, vitamin D and vitamin E, selenium, manganese, copper, zinc and hemoglobin) and explores the associations of micronutrients with various pregnancy complications (including gestational diabetes, gestational hypertension, thyroid function, anemia, abortion, birth outcomes and so on). Another feature of this book is the use of repeated measurements of dynamic micronutrient levels during pregnancy, and micronutrient statuses of mothers and infants are evaluated comprehensively. The works in this book can provide reference for the prevention of related perinatal complications, which has important public health significance. We sincerely hope that you may gain knowledge from these studies or that they may inspire you to undergo further research in related fields, so as to make contributions to maternal and infant health.

> **Yunxian Yu** *Editor*
