Pregnancy is an exciting time for expectant mothers, but it can also be a bit overwhelming. There is so much to learn about the development of your baby and the changes happening in your body. That’s why we’ve put together this guide to pregnancy by week.
Table of Contents
Weeks 1-4: Conception and Implantation
The first four weeks of pregnancy are all about conception and implantation. During this time, the egg is fertilized by sperm and travels down the fallopian tube to the uterus, where it implants in the uterine lining.
Many women don’t even know they’re pregnant during these early weeks, as there are often no symptoms. However, it’s important to start taking prenatal vitamins and avoid alcohol and tobacco as soon as you start trying to conceive.
Weeks 5-8: Embryonic Development
During weeks 5-8, your baby is officially an embryo. This is when the major organs and systems begin to form, including the heart, lungs, brain, and digestive system. At the end of week 8, your baby is about the size of a raspberry.
You may start to experience some pregnancy symptoms during this time, such as nausea and fatigue. It’s important to get plenty of rest and eat a healthy, balanced diet.
Weeks 9-12: Fetal Development
By weeks 9-12, your baby is officially a fetus. The major organs and systems are now fully formed, and your baby is starting to look more like a tiny human. During this time, your baby will start moving and kicking, although you may not feel it yet.
You may also start to notice some changes in your body, such as weight gain and breast tenderness. It’s important to continue eating a healthy, balanced diet and getting regular exercise.
Weeks 13-16: Second Trimester Begins
Weeks 13-16 mark the beginning of the second trimester. Your baby is now about the size of an avocado, and you may start to feel those first flutters of movement.
During this time, you’ll have a mid-pregnancy ultrasound to check on your baby’s development. You may also start to experience some pregnancy “glow,” as your skin and hair may start to look healthier and more radiant.
Weeks 17-20: Gender Reveal
By weeks 17-20, your baby’s sex organs are fully formed, and you may be able to find out whether you’re having a boy or a girl. This is also when your baby will start growing more hair and developing more fat stores.
You may start to experience some common pregnancy symptoms during this time, such as back pain and constipation. It’s important to stay hydrated and get plenty of rest.
Weeks 21-24: Viability
During weeks 21-24, your baby is considered “viable,” meaning that if born prematurely, there is a chance they could survive with medical intervention. Your baby is now about the size of a grapefruit and is developing more complex movements and reflexes.
You may start to experience some Braxton Hicks contractions during this time, which are practice contractions that help prepare your body for labor.
Weeks 25-28: Third Trimester Begins
Weeks 25-28 mark the beginning of the third trimester. Your baby is now about the size of a cauliflower and is developing more fat stores and muscle tone.
You may start to experience some more uncomfortable pregnancy symptoms during this time, such as heartburn and shortness of breath. It’s important to listen to your body and take breaks when you need to.
Weeks 29-32: Preparation for Birth
By weeks 29-32, your baby is developing more complex brain activity and is starting to settle into a head-down position in preparation for birth. You may also start to experience some nesting instincts, as you begin to prepare for your baby’s arrival.
It’s important to start preparing for labor and delivery during this time, such as taking childbirth classes and packing your hospital bag.
Weeks 33-36: Final Stretch
During weeks 33-36, your baby is almost fully developed and is just putting on the finishing touches. Your baby is now about the size of a honeydew melon and is starting to run out of room in your uterus.
You may start to experience some pre-labor symptoms during this time, such as increased Braxton Hicks contractions and vaginal discharge. It’s important to keep in touch with your healthcare provider and let them know if you’re experiencing any unusual symptoms.
Weeks 37-40: Full Term
By weeks 37-40, your baby is considered “full term” and is ready to be born at any time. Your baby is now about the size of a watermelon and is putting on the final touches before birth.
You may experience some signs of labor during this time, such as contractions and a “bloody show.” It’s important to have a plan in place for when labor starts, such as knowing when to go to the hospital or birthing center.
Conclusion
Pregnancy is a journey that is unique to each woman and each baby. By understanding the changes happening in your body and the development of your baby, you can better prepare for labor and delivery. Remember to take care of yourself and listen to your body throughout your pregnancy.
Frequently Asked Questions
1. When should I start taking prenatal vitamins?
You should start taking prenatal vitamins as soon as you start trying to conceive, as they are important for the early development of your baby.
2. What are some common pregnancy symptoms?
Common pregnancy symptoms include nausea, fatigue, breast tenderness, and back pain.
3. When should I start preparing for labor and delivery?
You should start preparing for labor and delivery in the third trimester, such as taking childbirth classes and packing your hospital bag.
4. What should I do if I experience unusual symptoms during pregnancy?
If you experience unusual symptoms during pregnancy, such as bleeding or severe abdominal pain, contact your healthcare provider right away.
5. When should I go to the hospital or birthing center?
You should go to the hospital or birthing center when you are having regular contractions that are increasing in intensity and frequency, or if your water breaks.