Second Trimester Pregnancy Guide: What to Expect From Weeks 14–27
From your baby's first noticeable movements to the mid-pregnancy ultrasound, here's what may change during your second trimester, what your prenatal appointments involve, and how to prepare for the months ahead.
There's something about reaching the second trimester that can make pregnancy feel a little more real. Maybe the nausea you've been dealing with finally starts to ease. Perhaps your clothes fit differently, your belly is beginning to show, or you're looking forward to feeling your baby move for the first time.
Or maybe you're still exhausted, uncomfortable, and wondering when that burst of second-trimester energy everyone talks about is supposed to arrive.
Both experiences are possible. Pregnancy rarely follows a perfectly predictable schedule, and the second trimester isn't automatically easy for everyone.
Between weeks 14 and 27, your baby goes through remarkable changes. You'll also have some important prenatal appointments, including the detailed anatomy ultrasound and, for most pregnancies, screening for gestational diabetes.
This guide walks through what happens during the second trimester, explains common symptoms, and helps you prepare without turning the next several months into an overwhelming to-do list.
If you're still in the earlier stages of pregnancy, you can begin with our First Trimester Pregnancy Guide.
When Does the Second Trimester Start and End?
The second trimester begins at 14 weeks and 0 days and ends at 27 weeks and 6 days of pregnancy. Week 28 marks the beginning of the third trimester.
Pregnancy is generally dated from the first day of your last menstrual period rather than the date of conception. Your prenatal care provider may confirm or adjust your estimated due date using ultrasound and your medical history.
Although pregnancy is often discussed in three trimesters, your baby's development is continuous. There's no sudden change that happens the moment you enter week 14.
Think of this trimester as a period of increasingly noticeable growth, developing senses, strengthening movements, and important prenatal screening.
Second Trimester Pregnancy at a Glance
Pregnancy weeks | Baby's development | What you may experience |
14–16 | Movement continues; body proportions and features develop | Nausea may ease, appetite may return, belly may become more noticeable |
17–20 | Sensory development continues; movements may begin to be noticeable | Early flutters, stretching sensations, changing body shape |
21–24 | Movements grow stronger; hearing and other functions continue developing | More noticeable movement, back discomfort, heartburn or leg cramps |
25–27 | Brain, lungs and other organs continue maturing | Stronger movements, growing belly, more pressure and sleep changes |
These are broad developmental phases rather than a checklist of milestones every pregnancy must meet on a particular day.
Weeks 14–16: Your Body May Start Feeling Different
By week 14, some of the symptoms associated with early pregnancy may begin to improve.
Hormone levels and your body's response to pregnancy continue changing, and the placenta is playing an important role in supporting your growing baby.
You may notice that nausea becomes less frequent or that certain foods finally sound appealing again. You might also feel more comfortable eating regular meals.
But improvement isn't universal. Some people continue experiencing nausea, fatigue, food aversions or other symptoms well into the second trimester.
What's Happening With Your Baby?
Your baby is continuing to develop facial features, muscles, bones and the ability to move.
The arms and legs are becoming more proportionate, and movements are becoming increasingly coordinated, even though you probably won't feel most of them yet.
Important organs have already begun forming earlier in pregnancy and continue developing throughout this stage.
What You Might Notice
Your waistline may gradually change as your uterus grows. Some people notice a small pregnancy bump by this point, while others don't look visibly pregnant for several more weeks.
You may also experience nasal congestion, mild headaches, constipation, or changes in vaginal discharge.
A growing belly isn't an accurate way to measure your baby's health. Body shape, abdominal muscles, previous pregnancies, and other factors influence when pregnancy becomes noticeable.
Helpful habit: If you're feeling better, consider getting back into a comfortable routine with meals, hydration and gentle physical activity. You don't need to make up for weeks when fatigue or nausea made those things difficult.
Weeks 17–20: The First Flutters and the Anatomy Ultrasound
For many people, this is one of the most memorable stages of pregnancy.
Your baby is becoming more active, and you may begin noticing movements that feel like fluttering, bubbling, gentle tapping or something shifting inside your abdomen.
These early movements are often called quickening.
When Will You Feel Your Baby Move?
Many pregnant people first notice fetal movement between approximately 16 and 24 weeks.
If this is your first pregnancy, it may take longer to recognize the sensation. If you've been pregnant before, you may identify those early movements sooner.
Placental position can also affect how movements feel. An anterior placenta, for example, may cushion some early sensations.
At first, movement may be subtle and inconsistent. You might feel something one day and have trouble noticing it the next.
If you have not felt any fetal movement by 24 weeks, contact your prenatal care provider. Once you have begun recognizing your baby's usual movements, report any noticeable slowing, stopping or concerning change promptly rather than waiting for a particular gestational week.
What Happens at the 20-Week Anatomy Scan?
The detailed anatomy ultrasound is commonly performed between 18 and 22 weeks.
During the examination, a sonographer looks at major fetal structures, including the brain, spine, heart, kidneys, abdomen and limbs. The ultrasound also provides information about the placenta, amniotic fluid and growth measurements.
The appointment may be longer than an early pregnancy ultrasound because there is more anatomy to examine.
Sometimes, the sonographer needs additional views because of the baby's position. Being asked to return for another ultrasound doesn't automatically mean something is wrong.
It's also important to understand that an anatomy scan cannot identify every possible condition or developmental concern.
Can the Ultrasound Tell You the Baby's Sex?
Sometimes the external genitalia can be seen during the scan, depending on the baby's position and the quality of the images.
If you want to know, ask your clinic whether they provide this information. If you prefer a surprise, let the sonographer know before the examination.
The main medical purpose of the anatomy scan is to evaluate development, not to determine fetal sex.
Weeks 21–24: Your Baby's Movements Become More Noticeable
By this stage, your baby's movements may begin to feel more like definite kicks, turns or stretches.
You might notice activity when you're sitting quietly, resting after a meal or lying in bed.
According to the American College of Obstetricians and Gynecologists (ACOG), the fetus continues developing its sucking reflex, accumulating fat under the skin, and making stronger movements during this part of pregnancy.
The lungs and nervous system are still maturing, with considerable development remaining before birth.
Why Does My Baby Seem More Active at Night?
Sometimes you simply notice movement more when you're not busy walking, working or concentrating on other things.
Babies also have periods of activity and rest in the uterus.
That doesn't mean every baby follows the same movement schedule, and it's too early to assume all pregnancies have identical patterns.
As movements become more familiar, pay attention to what is typical for your baby. If movement becomes noticeably reduced or stops, contact your maternity care team promptly.
What About Back Pain, Heartburn and Leg Cramps?
As your abdomen grows, your posture and center of gravity change. Your joints and ligaments also respond to pregnancy-related hormonal changes.
These changes can contribute to lower-back discomfort, pelvic pressure and altered balance.
Heartburn may occur as pregnancy hormones affect digestion and the growing uterus places more pressure on the stomach.
Leg cramps can also become more noticeable, particularly at night.
Simple adjustments may help: supportive footwear, comfortable sitting positions, smaller meals if heartburn is troublesome, gentle stretching, and breaks from long periods of standing.
However, persistent or severe pain should be evaluated rather than assumed to be a normal pregnancy symptom.
Weeks 25–27: Preparing for the Third Trimester
Toward the end of your second trimester, your baby's movements may become stronger and easier to identify.
The brain, lungs and other organs continue maturing, and your baby is growing steadily.
Your abdomen may feel heavier, and everyday activities such as sleeping comfortably, climbing stairs or bending down can require more adjustment.
This is also an important period for prenatal screening.
Gestational Diabetes Screening
Most pregnant people are screened for gestational diabetes between 24 and 28 weeks, unless earlier testing or individual circumstances indicate a different approach.
Gestational diabetes occurs when blood glucose becomes elevated during pregnancy.
It may not cause obvious symptoms, which is why screening matters even when you feel well.
In many U.S. clinics, screening begins with drinking a glucose solution and having a blood sample taken after a set period. If the result is above the screening threshold, additional testing may be recommended.
Other practices use a different diagnostic testing approach.
Ask your clinic whether fasting is required. Instructions depend on the particular test being performed.
A screening result is not a judgment about your diet or habits. Gestational diabetes involves pregnancy-related changes in insulin resistance, and it can occur in people with different body types and lifestyles.
If you're diagnosed, your care team can explain blood glucose monitoring, nutrition, activity and medication options when needed.
Tdap Vaccination Begins at Week 27
The Tdap vaccine helps protect against tetanus, diphtheria and pertussis, also known as whooping cough.
Current ACOG guidance recommends Tdap during each pregnancy, preferably early in the 27–36 week window, to help provide antibodies to the baby before birth.
Discuss timing with your prenatal care provider, especially as you approach week 27.
You should also review influenza, COVID-19 and other indicated immunizations with your clinician based on current recommendations and your medical circumstances.
Common Second Trimester Symptoms
The second trimester can bring a new collection of physical changes. Some are mild inconveniences, while others deserve a conversation with your doctor.
1. Round Ligament Pain
Round ligament pain can feel like a brief, sharp, pulling or stretching sensation in the lower abdomen or groin.
It may happen when standing up quickly, rolling over in bed, coughing or changing positions.
Mild, short-lived discomfort can occur as the uterus grows. But severe, persistent or worsening abdominal pain is not something to diagnose yourself. Contact your care team, particularly if you also have bleeding, fever or other concerning symptoms.
2. Heartburn and Indigestion
Pregnancy hormones and pressure from the growing uterus can contribute to reflux.
Smaller meals, avoiding foods that reliably trigger symptoms, and remaining upright after eating may help.
Ask your clinician before using an over-the-counter heartburn medicine, since some products are not suitable during pregnancy.
3. Constipation
Constipation can continue during pregnancy, particularly because hormonal changes slow digestion and iron supplements can contribute.
Fiber-rich foods, adequate fluids and comfortable physical activity may help.
If constipation is persistent or painful, your healthcare professional can advise on suitable treatment options.
4. Back Pain and Pelvic Discomfort
Your changing posture, ligament flexibility and abdominal growth can affect your back and pelvis.
Consider supportive footwear, gentle movement, changing positions throughout the day and using pillows for comfort.
Severe pain, weakness, fever, difficulty walking or other unusual symptoms need professional assessment.
5. Changes in Skin and Pigmentation
Some people notice a darker line down the abdomen, darker areas of facial skin, or changes around the nipples.
Stretch marks may also become visible as the skin expands.
These changes vary widely. They aren't reliable indicators of the baby's sex or a measure of how healthy the pregnancy is.
6. Fatigue or Difficulty Sleeping
You may have more energy than you did in early pregnancy, but tiredness can still be significant.
Sleep may become less comfortable as your body changes. Frequent urination, reflux, congestion, worry or leg cramps may contribute.
If fatigue is extreme or worsening, tell your prenatal care provider. Anemia and other medical issues can contribute to tiredness during pregnancy.
Important Prenatal Appointments and Tests During Weeks 14–27
One way to make the second trimester less overwhelming is to understand which appointments are commonly scheduled and why they matter.
Timing | Appointment or test | Purpose |
Around 15–22 weeks | Second-trimester serum screening, if appropriate | Screens for selected chromosomal conditions and neural tube defects |
Around 18–22 weeks | Detailed anatomy ultrasound | Evaluates major fetal structures and pregnancy anatomy |
Throughout trimester | Routine prenatal visits | Reviews symptoms, blood pressure, fetal growth and other individual needs |
Around 24–28 weeks | Gestational diabetes screening | Checks for elevated blood glucose during pregnancy |
From 27 weeks | Tdap vaccine | Helps protect the newborn against pertussis |
Your exact schedule may be different based on prior screening, medical history, pregnancy complications, or the type of prenatal care you're receiving.
Do You Need More Genetic Testing?
Some second-trimester screening tests may be offered depending on what you've already completed earlier in pregnancy and your preferences.
For example, maternal serum screening can provide information about the chance of certain conditions, while an anatomy ultrasound examines fetal structures.
Screening tests estimate risk; they do not independently confirm or rule out every condition.
If a screening result raises concern, your clinician may discuss additional testing or referral to a specialist.
Ask what each test looks for, whether it duplicates earlier testing, and what different results could mean for your care.
What to Eat During the Second Trimester
You may notice your appetite increasing during this trimester as nausea improves and your nutritional needs change.
Rather than focusing on the familiar idea of “eating for two,” aim for satisfying meals that provide a variety of nutrients.
Useful components include protein foods, vegetables, fruit, whole grains or other fiber-rich carbohydrates, and sources of healthy fats.
Iron, folate, calcium, vitamin D and other nutrients are especially relevant during pregnancy. Continue taking the prenatal vitamin recommended by your clinician.
If you eat Nigerian, Asian, Caribbean, Mediterranean or other cultural cuisines, you do not need to abandon your usual foods to eat well during pregnancy. Many traditional meals can provide excellent combinations of protein, vegetables, carbohydrates and fiber.
What matters is nutritional balance, safe food preparation, and any adjustments needed for your particular medical circumstances.
Easy Meal Ideas
Try combinations such as:
Rice with thoroughly cooked chicken or fish and a generous serving of vegetables.
Beans or lentils with vegetables and an appropriate whole-grain or starchy side.
Oatmeal with fruit, nuts or nut butter when tolerated.
Fully cooked eggs with toast and sautéed vegetables.
Plain pasteurized yogurt with fruit and oats.
Choose fish that are lower in mercury, make sure meats and eggs are properly cooked, and follow pregnancy food-safety guidance.
If you have gestational diabetes or another condition requiring a specific eating plan, follow your care team's recommendations.
Is It Safe to Exercise During the Second Trimester?
For many people with uncomplicated pregnancies, physical activity is both safe and beneficial.
ACOG recommends aiming for at least 150 minutes of moderate-intensity aerobic activity each week when there are no medical contraindications.
That doesn't mean you need to start an intense workout routine.
Walking, swimming, suitable stationary cycling, and pregnancy-appropriate exercise can be comfortable options.
If you haven't been active recently, begin gradually and talk with your healthcare professional about any concerns.
As your pregnancy progresses, avoid activities with a high risk of falling, abdominal injury or overheating.
Stop exercising and seek medical advice if you experience vaginal bleeding, fluid leakage, chest pain, significant dizziness, or other warning symptoms.
For some pregnancies, exercise recommendations must be individualized. Your own care plan should always come first.
When Should You Call Your Doctor During the Second Trimester?
Most everyday second-trimester symptoms aren't emergencies, but pregnancy complications can occur at any stage.
Contact your healthcare provider promptly for symptoms that concern you, and seek immediate medical evaluation for serious warning signs.
The CDC's Hear Her campaign identifies important warning symptoms during pregnancy, including:
A severe headache that persists or worsens.
Blurred vision or other changes in eyesight.
Severe or persistent abdominal pain.
Vaginal bleeding or fluid leaking.
Trouble breathing or chest pain.
Fever of 100.4°F (38°C) or higher.
Sudden, extreme swelling of the hands or face.
Fainting or severe dizziness.
Pain, redness or swelling in one leg.
A noticeable decrease or stopping of fetal movement after you have begun feeling a usual pattern.
Thoughts of harming yourself or your baby.
If you have severe symptoms, seek emergency care. If you cannot reach your maternity team, go to an emergency department and tell them you are pregnant.
What If You Haven't Felt Your Baby Move Yet?
The timing of first movement varies, especially during a first pregnancy.
If you haven't felt any movement by 24 weeks, contact your prenatal care provider.
If you've already begun noticing movements and think they're slowing or stopping, contact your maternity team promptly. Don't wait until the following day or rely on an at-home Doppler to reassure yourself.
Formal movement-counting guidance varies by clinician and stage of pregnancy. Ask your prenatal care provider how and when they recommend monitoring your baby's usual movement pattern.
What Should You Do During the Second Trimester?
You don't need to finish every pregnancy-related task before week 28.
This is a helpful time to handle a few decisions while leaving room for rest, work and normal family life.
Your Practical Second Trimester Checklist
☐ Schedule or confirm the anatomy ultrasound.
☐ Review any prenatal screening results and follow-up recommendations.
☐ Ask when your gestational diabetes screening will take place.
☐ Discuss recommended vaccinations, including Tdap beginning at week 27.
☐ Continue your prenatal vitamin and review medications or supplements with your clinician.
☐ Find comfortable clothing, footwear or supportive pillows if needed.
☐ Begin considering your baby registry without feeling pressured to buy everything immediately.
☐ Review maternity leave, parental leave or childcare arrangements if relevant.
☐ Start discussing your birth location, care preferences and questions for later appointments.
☐ Make space for rest and emotional support.
If you're wondering when to start buying baby essentials, our When Should You Start a Baby Registry? guide can help you decide what makes sense for your timeline.
You can also use our Baby Registry Checklist for First-Time Parents when you're ready to organize your purchases.
Three Questions Worth Asking at Your Next Appointment
If you don't know where to start, these three questions can make a prenatal visit more productive:
“Is my baby's growth and development consistent with what you've seen so far?”
This opens the conversation about ultrasound findings, measurements and follow-up testing.
“Which symptoms should I expect at this stage, and which ones would you want me to call about?”
Your care team can offer advice appropriate to your medical history.
“What appointments or decisions should I prepare for before week 28?”
This helps you plan without trying to predict everything that will happen during the third trimester.
The Emotional Side of the Second Trimester
Pregnancy discussions often describe the second trimester as the enjoyable middle stretch.
For some people, that description fits. Physical symptoms improve, the pregnancy begins to feel more visible, and the anatomy scan brings new excitement.
For others, the trimester involves ongoing nausea, a difficult diagnosis, anxiety about testing, changes in body image, or exhaustion from balancing pregnancy with work and family responsibilities.
You may also feel differently from one day to the next.
There's no requirement to feel excited all the time or to enjoy every physical change.
If anxiety, low mood or emotional distress is interfering with your daily life, talk with your prenatal care professional. Mental health is part of prenatal health, and support is available.
Frequently Asked Questions About the Second Trimester
Is the second trimester always easier than the first?
No. Many people experience improvement in nausea and fatigue, but symptoms vary. Some continue to feel unwell or develop new discomforts as pregnancy progresses.
When does a pregnancy bump usually start showing?
There is no exact week. Body shape, abdominal muscles, previous pregnancies, fetal position and other factors affect when a bump becomes noticeable.
When should I first feel my baby kick?
Many people first notice movement between 16 and 24 weeks. If you haven't felt movement by 24 weeks, contact your prenatal care provider.
What happens at the 20-week ultrasound?
The anatomy ultrasound typically examines major fetal structures, growth measurements, the placenta and other features of the pregnancy. It may also reveal fetal sex if the position allows, but identifying the sex isn't its main purpose.
When is the gestational diabetes test?
Most people are screened between 24 and 28 weeks, though some need earlier testing. Your clinic can explain the test used and whether fasting is required.
Is heartburn normal in the second trimester?
Heartburn is common during pregnancy, but symptoms that are severe, persistent or unusual should be discussed with your healthcare professional.
Can you sleep on your back during the second trimester?
As pregnancy progresses, prolonged lying flat on your back may become uncomfortable and can affect circulation in some people. Side sleeping is often recommended later in pregnancy. If you wake on your back, don't panic; reposition comfortably. Ask your clinician about individualized advice, especially if you feel dizzy or unwell.
Is it safe to travel during the second trimester?
Many people with uncomplicated pregnancies can travel during this period. Discuss your plans with your clinician, especially if you have pregnancy complications, need access to ongoing care, or are planning a long journey.
Do you have to start buying baby supplies in the second trimester?
No. Some people enjoy beginning a registry or making a few purchases at this stage, but there's no universal shopping schedule. Focus first on the essentials and the time needed to arrange them.
What happens at 28 weeks?
Week 28 begins the third trimester. Prenatal appointments, fetal growth, movement monitoring and birth preparations become increasingly important as delivery approaches.
The Bottom Line
The second trimester is a period of remarkable development, but it isn't a race to reach a particular milestone.
Your baby is growing, moving and developing new abilities. Your body is adapting, and you'll have important opportunities to check on the pregnancy through prenatal appointments and screening.
You might feel energetic and comfortable, or you might need more rest and support than you expected. Both experiences deserve care and attention.
Focus on attending your appointments, understanding the symptoms that need medical attention, eating and moving in ways that support your health, and preparing at a pace that works for your family.
There is still time for the nursery, the registry and the long list of decisions ahead. For now, take the next stage as it comes.
Medical References
A Note From Numebaby: This article provides general pregnancy education and should not replace personalized prenatal care. Symptoms, testing schedules and medical recommendations vary. Contact your prenatal healthcare professional for advice specific to your pregnancy, and seek immediate medical care for urgent warning signs.
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