Congratulations, you’ve made it to the second trimester! If the last few months were a rollercoaster of morning sickness, fatigue, and overwhelming emotions, you’re likely breathing a sigh of relief. Often called the “honeymoon phase” of pregnancy, the second trimester (weeks 13 through 27) is a period of renewed energy, less nausea, and the exciting milestone of feeling your baby move. It’s a time of noticeable growth—for both you and your little one—and an opportunity to start preparing for their arrival. This guide will walk you through the exciting what to expect in the second trimester, from the physical changes you’ll experience to the incredible development happening inside you. For a look back at the beginning of your journey, you can read our guide on first trimester symptoms and changes.
What to Expect in the Second Trimester
The first part of your journey was all about survival. Now, it’s about thriving. While some pregnancy symptoms may linger, many of the more difficult ones begin to fade, replaced by a new set of exciting and manageable changes. The pregnancy symptoms week 13-27 are often less intense, allowing you to enjoy this unique stage.
The “Pregnancy Glow”
You may have heard of the “pregnancy glow,” and it’s not a myth! Increased blood volume and circulation can give your skin a flushed, radiant look. Hormonal changes might also improve your hair and nail growth, making this a time where you might feel more beautiful and vibrant.
Feeling Fetal Movement
This is, for many, the most anticipated part of the second trimester. Between weeks 16 and 25, you’ll start to feel little flutters, bubbles, or taps in your belly—these are your baby’s first movements, often called “quickening.” At first, they might feel like gas, but they will become stronger and more distinct as your baby grows. Feeling this connection is a truly magical experience.
A Growing Bump and Your Changing Body
Your baby bump will become more noticeable, and you’ll likely need to transition into maternity clothes. Your uterus is expanding, and you may experience a new ache called round ligament pain. This is a sharp, stabbing pain on one or both sides of your lower abdomen, caused by the stretching ligaments that support your uterus. It’s harmless but can be startling. You may also notice changes in your breasts as they prepare for milk production. For more information on your body’s changes, you can consult resources from the American College of Obstetricians and Gynecologists.
Navigating Emotions and Moods
While the mood swings of the first trimester may lessen, new emotional experiences can arise. Seeing your body change and preparing for parenthood can bring a mix of excitement, anxiety, and deep love. It’s a good time to talk to your partner and friends about how you’re feeling and to focus on self-care.
Fetal Development Week by Week
The second trimester is a period of incredible growth and development for your baby. They transform from a tiny embryo into a recognizable infant, complete with tiny features and a unique personality.
Weeks 13-16: From Grapes to Avocados
- Week 13: Your baby’s organs are fully formed and will now focus on growth and maturation. They can make urine and swallow amniotic fluid.
- Week 14: Your baby’s neck is getting longer, and their head is becoming more upright. Their eyes are moving to the front of their face.
- Week 15: You may start to see hair patterns on their scalp. Their bones are hardening, and they can respond to light and sound.
- Week 16: Your baby’s facial muscles are developing, allowing them to squint and frown. Their hands can now grasp.
Weeks 17-20: Sensory Development and Hearing
- Week 17: Your baby’s fat stores are starting to develop. They are about the size of a turnip.
- Week 18: Your baby’s ears are fully developed and they can now hear your voice and other sounds from the outside world.
- Week 19: A waxy coating called vernix caseosa is forming on their skin to protect it from the amniotic fluid.
- Week 20: This is the halfway point! You’ll likely have your anatomy scan around this time, a detailed ultrasound that checks on your baby’s development. You may also discover your baby’s sex, leading to exciting gender reveal ideas!
Weeks 21-27: Rapid Growth and Brain Development
- Week 21: Your baby is becoming more active, and their movements are getting stronger. They’re developing a sleep-wake cycle.
- Week 22: Your baby’s nervous system is maturing, and their senses are sharpening.
- Week 23: Their hearing is more acute, and they might even be able to recognize your voice.
- Week 24: Their lungs are developing, and they are practicing breathing movements with the amniotic fluid.
- Week 25: Your baby is gaining weight rapidly and starting to look like a newborn. Their hair is growing in more thickly.
- Week 26: Their brain is growing quickly and developing folds and grooves. For more details on fetal brain development, a resource from the National Institute of Neurological Disorders and Stroke can be very helpful.
- Week 27: The second trimester is coming to an end. Your baby’s lungs are maturing, and their eyes can open and close.
Second Trimester Checklist
This trimester is the perfect time to get organized and prepare for your baby’s arrival. Here’s a second trimester checklist of important tasks to accomplish:
- Anatomy Scan: This detailed ultrasound is typically done between weeks 18 and 22. It checks for your baby’s physical development and can confirm their sex.
- Maternity Clothes: You’ll need some new clothes that are comfortable and fit your growing bump. Don’t forget comfortable shoes!
- Prenatal Classes: Sign up for childbirth, breastfeeding, and infant care classes.
- Baby Registry: Start creating a registry for all the essentials you’ll need. A comprehensive baby registry checklist can help you make sure you don’t forget anything.
- Discuss with Partner: Talk about your parenting philosophies, your birth plan, and your feelings about becoming parents.
- Plan a Babymoon: If you’re able to, take a relaxing trip with your partner before the baby arrives.
- Research Childcare: If you plan to return to work, it’s never too early to start looking for childcare options.
- Think About Your Birth Plan: While it doesn’t have to be set in stone, thinking about your preferences for labor and delivery can be helpful. You can find excellent resources on creating a birth plan from the March of Dimes.
Nutrition and Exercise
Maintaining a healthy lifestyle is key during your second trimester. This is a great time to focus on good nutrition and moderate exercise, as your energy levels have likely returned.
Nutrition
Continue to eat a balanced diet rich in fruits, vegetables, lean proteins, and whole grains. Pay special attention to iron to prevent anemia and calcium for your baby’s developing bones. Folic acid and other prenatal vitamins are still essential. Make sure you are drinking plenty of water to stay hydrated. For more dietary guidance, the Centers for Disease Control and Prevention offers detailed advice on nutrition during pregnancy.
Exercise
Regular, moderate exercise can help with common discomforts, improve your mood, and prepare your body for labor. Safe exercises include walking, swimming, and prenatal yoga. If you’re looking for a good resource, our safe prenatal yoga routines article offers great suggestions. Always listen to your body and consult your doctor before starting any new fitness routine.
Common Questions About the Second Trimester
Is it normal to feel less morning sickness now?
Yes, absolutely. For most people, the intense nausea and vomiting of the first trimester subside significantly or disappear entirely around week 12 to 14. This is a normal and welcome change.
How do I know if my baby’s movements are normal?
At first, movements can be sporadic and gentle. As your baby grows, you’ll start to feel more regular kicks and rolls. If you’re ever concerned about a lack of movement, especially after week 24, contact your healthcare provider immediately.
What should I do about heartburn?
Heartburn is a common symptom in the second trimester and beyond. Try eating smaller, more frequent meals, avoiding spicy or fatty foods, and not lying down immediately after eating. If it’s severe, your doctor can recommend safe antacids.
Is it safe to have sex during the second trimester?
For most low-risk pregnancies, sex is perfectly safe during the second trimester. Your doctor will let you know if there are any reasons to avoid it. The Mayo Clinic provides a helpful overview of sexual activity during pregnancy.
Conclusion
The second trimester is a beautiful and transformative time in your pregnancy journey. The discomforts of the early months are often replaced by a surge of energy and the wonder of feeling your baby move. As you move through these weeks, you will be checking off important milestones, from your anatomy scan to creating a baby registry. While every pregnancy is unique, knowing what to expect can help you feel more confident and prepared. Enjoy this special time of feeling your baby’s presence, and remember to take care of yourself.
