★ I truly wish every girl had read this book! Written by Mr. Liu Cenglou, a former obstetrician and gynecologist at a top-tier hospital in Beijing and the founder of “The Eleventh Clinic,” this is an essential guide to bodily health for all adolescent girls!
★ It dismantles the shame surrounding puberty, menstruation, appearance, and body image, empowering every girl to grow up with confidence and good health! Any curiosity, worries, confusion, doubts, concerns, or anxieties that teenage girls might have but hesitate to ask about can all find answers within these pages.
★ You could have understood yourself much better! Over forty illustrations will help you rediscover your body and teach you how to safeguard your physical well-being.
★ This book challenges stereotypes and misconceptions, offering essential, science-based health knowledge that every girl needs to know!

You are one-of-a-kind—you are you! As you navigate the challenging and anxious years of adolescence, may this book accompany you through it all with peace of mind.
At some point, every girl begins to notice subtle changes in her body: her breasts grow, her body hair starts to shift, her first period arrives quietly, and her emotions become more volatile. These physical transformations influence her inner world, while heightened sensitivity, anxiety, and worry can, in turn, amplify her bodily responses. Throughout the journey of growing up, each girl experiences a profound upheaval—both physical and emotional. How she chooses to face these changes will shape her future.
This book offers a comprehensive overview of the physical development that occurs during puberty. With over forty detailed illustrations, it precisely depicts key female anatomy—including the uterus, ovaries, and breasts—helping you gain a fresh, holistic understanding of your own body. It invites you to reconnect with that “old friend” you’ve never truly known and to embrace the essential lessons of puberty health education. The more you learn about your body, the better equipped you’ll be to recognize potential warning signs and take confident, proactive steps to care for your health.
We address the health concerns, curiosities, and uncertainties that girls often grapple with, dispelling harmful stereotypes along the way. By fostering accurate knowledge and empowering girls to view their bodies and needs with honesty and compassion, we aim to inspire self-love and self-empowerment. We also provide guidance for the emotional struggles many girls face—feelings of confusion, helplessness, and indecision—offering practical advice to help them prepare in advance and navigate the waves of change with greater ease and resilience.
It is our hope that more and more girls will come to realize that they are ultimately responsible for their own health. Above all, what matters most is learning to see and love yourself, embracing every change your body undergoes with openness and grace, and stepping into physical transformation, emotional growth, and new roles with greater strength and confidence.

Mr. Liu Cenglou
Former obstetrician and gynecologist at a top-tier Grade-A hospital in Beijing, holds a Master’s degree in Clinical Medicine. He is a popular online creator of women’s health content and the founder of the highly acclaimed women’s health and lifestyle self-media platform “The Eleventh Clinic.” He is also the author of the best-selling books “A Guide to Women’s Self-Care” and “A Guide to Pregnancy Care.”
“I am Liu Cenglou, and I love this world.”

Chapter One
Reunderstanding Our Bodies
006 The General Structure and Location of the Female Reproductive System
008 The Shape and Function of the Ovaries
014 Possible Problems Affecting the Ovaries
034 The Shape and Structure of the Fallopian Tubes
036 The Shape and Structure of the Uterus
039 How Menstruation Occurs
044 The Fertility Function of the Uterus
047 Additional Minor Functions of the Uterus
048 Uterine-Related Diseases
058 The Location of the Cervix
062 What Is the Significance of the Cervix?
064 What Problems Can Arise in the Cervix?
077 The Functions and Structure of the Vagina
080 Why Is There Vaginal Discharge?
083 What Are Some Vaginal Disorders?
092 The Structure of the Vulva
098 How Should We View the Shape of the Vulva?
101 How Should We View the Color of the Vulva?
107 How Should We Understand the “Hymen”?
111 What Does a Doctor’s Perspective on the Vulva Look Like?
114 Potential Issues That May Affect the Vulva

Chapter Two
The Many Questions of Young Girls
126 The Structure and Function of the Breasts
129 How Do Breasts Develop?
132 What Determines Breast Size?
134 Is There a Problem if There Are Hard Lumps in the Breasts?
135 Can Massage Make Breasts Bigger?
136 Is It Normal for Breasts to Be Asymmetrical?
137 What Colors Are the Areola and Nipple, Respectively?
139 What Shape Are Nipples?
141 What Should Be Done About Inverted Nipples?
144 What Can Be Done If Nipples Are Constantly Itchy?
145 Are Small Pimples on the Areola Serious?
146 Is It Normal for Hair to Grow on the Areola?
147 Why Does Touching the Nipple Feel Uncomfortable?
148 What Are Accessory Breasts?
150 Can Breasts Be Self-Examined?
151 How to Choose the Right Bra?
154 Why Do We Feel Uncomfortable During Menstruation?
156 What Is Primary Dysmenorrhea?
159 Is Pre-Menstrual Breast Tenderness a Disease?
160 Why Do We Feel Very Down Before Our Periods?
162 What Should Be Done About Diarrhea During Menstruation?
164 Why Do Breakouts Occur During Menstruation?
166 Why Do We Feel Cold During Our Periods?
170 What Should Be Done About Irregular Periods?
173 Why Do Periods Come Again Just Half a Month Later?
175 What Should Be Done If Periods Last Too Long?
177 What Should Be Done When Menstrual Blood Is Very Dark and Contains Clots?
180 Why Does Weight Increase Before Menstruation? And Why Don’t We Gain Weight Even When Eating During Our Periods?
182 What Foods Should Be Avoided During Menstruation?
185 What Activities Should Be Avoided During Menstruation?
193 How Can We Delay Our Periods?
195 How to Choose Sanitary Pads?
200 Are There Other Menstrual Hygiene Products Available?
204 What Is Leukorrhea?
207 What Kind of Leukorrhea Is Abnormal?
210 How Should We Wash the Genital Area?
217 What Should Be Done About Yellowing Underwear?
219 How to Wash Underwear?
223 How Often Should Underwear Be Replaced?
225 Why Do We Have Pubic Hair?
231 Can We Get Pimples Down There Too?
232 What Causes Vaginal Flatulence?
234 Why Has My Butt Grown Larger?
236 Why Do I Have a Little Belly?
237 When Should I See a Doctor?
241 What Should Be Noted When Visiting a Gynecologist?
248 Which Gynecological Examination Is Most Uncomfortable?
253 Are All Gynecological Diseases Related to Sexual Activity?

Chapter Three
We Must Learn to Protect Ourselves
259 Sexuality and Sexual Behavior
272 What Are Sexually Transmitted Diseases?
274 How Are Sexually Transmitted Diseases Spread?
278 How Are Sexually Transmitted Diseases Treated?
281 Is HPV Infection Really Scary?
285 Can People Who Are Infected with HPV Still Live Normally?
286 Why Get Vaccinated Against HPV?
289 Is the HPV Vaccine Really Effective?
292 What Are Common Methods of Contraception?
296 You Have the Right to Say “No.”
306 What Should Be Done After Being Forced Into Sexual Intercourse?
308 Is Having Sex While Drunk a Real Thing?
312 “Reading” Your Own Emotions
317 How to Deal With Differences Between Yourself and Others
320 How to View Others’ Opinions About You
324 How Should We Handle Intimate Relationships?
328 How to Cope with Emotional Abuse
330 How to Recognize Emotional Manipulation
332 How to End a Toxic Relationship
335 How to Be Yourself
337 Conclusion
340 Appendix: 77 Health Tips