As a new mom, you might be curious about how long it takes for your baby to fully develop. From the moment of conception, your baby starts developing and growing. However, this development process takes time, and it can be helpful to understand what to expect during each stage of your baby’s growth.
Table of Contents
First Trimester Development
During the first trimester, your baby is developing rapidly. By the end of the first month, your baby’s brain, spinal cord, and heart have started to form. By the time you reach the end of the first trimester, your baby’s organs and limbs have started to form, and your baby’s heart is beating.

Second Trimester Development
The second trimester is an exciting time for new parents because you can start to feel your baby’s movements. During this time, your baby’s bones are hardening, and your baby is growing rapidly. Your baby’s skin also starts to thicken, and your baby’s eyes and ears move into their final position.
Third Trimester Development
During the third trimester, your baby is getting ready for birth. Your baby’s lungs are maturing, and your baby’s digestive system is starting to work. Your baby’s brain is also developing rapidly during this time, and your baby is starting to respond to sounds and light.
After Birth Development
After birth, your baby continues to develop and grow. During the first year, your baby will learn to roll over, sit up, crawl, and eventually walk. Your baby’s brain is also developing rapidly during this time, and your baby will start to develop language and social skills.
Frequently Asked Questions
1. How long does it take for a baby’s brain to fully develop?
A baby’s brain continues to develop throughout childhood and adolescence. However, the most significant period of brain development occurs during the first three years of life.
2. When do babies start to crawl?
Most babies start to crawl between six and ten months of age.
3. When do babies start to walk?
Most babies start to walk between nine and fifteen months of age.
4. When do babies start to talk?
Most babies start to say their first words between ten and fourteen months of age.
5. When do babies start to develop social skills?
Babies start to develop social skills from birth. However, most babies start to show an interest in other people between three and six months of age.
In conclusion, a baby’s development process is a beautiful and complex journey that starts from conception and continues throughout childhood and adolescence. Understanding what to expect during each stage of your baby’s growth can help you support your baby’s development and enjoy this special time in your life.