Your Second Trimester: Week-by-Week Changes, Symptoms & What to Expect

If the first trimester felt like survival mode, the second trimester is where most women finally come up for air. The nausea starts to ease, energy returns, and for the first time, you might actually feel like yourself again, just with a growing belly and a whole lot of new sensations to get used to.

Weeks 13 through 27 make up the second trimester, and they bring some of the most exciting milestones of your entire pregnancy: your first baby kicks, the anatomy scan, and a bump that finally makes it all feel real.

What you'll find in this guide: A breakdown of what's happening in your body, week-by-week highlights from weeks 14 to 27, the most common second trimester symptoms, and clear signs of when to call your doctor.

This is also a trimester that asks a lot of you emotionally. Your body is changing fast, your identity is shifting, and the mental load of preparing for a baby is very real. You don't have to navigate all of it alone.

Most women go into the second trimester expecting relief. And relief does come, but it arrives alongside a different kind of disorientation that nobody really warns you about.

Jess, 34, describes it this way:

"The nausea lifted around week 14, and I finally felt human again. But then something unexpected happened: I started feeling anxious in a completely different way. In the first trimester, I was scared something would go wrong. In the second trimester,r I started realizing it was actually going to happen – and I had no idea who I was going to be on the other side of it. The anatomy scan was at week 20. I'd been looking forward to it for weeks, but sitting in that room, I couldn't stop wondering whether everything would be okay, whether I was prepared enough, whether I was the right person for this. The technician pointed out the spine, the heart chambers, and the little fist. And I just cried – not from sadness, but from something I still can't name. I felt guilty for not feeling purely happy. Like I was doing something wrong by feeling complicated things during the easy trimester."

That guilt – for feeling anything other than glowing gratitude during the second trimester – is one of the least-talked-about parts of this stage. What follows covers what's actually happening in your body and your baby week by week, including the parts that are harder to put in a chart.

What's Happening in Your Body During the Second Trimester

Your body is doing an enormous amount of work right now, even on the days when it doesn't feel like it. Here's a look at the major physical changes you can expect across weeks 13 to 27.

Your Energy Returns (Finally)

One of the most welcome shifts of the second trimester is the return of energy. The crushing fatigue of the first trimester eases for most women as hormone levels begin to stabilize. Mood swings tend to settle too, making this a good window to tackle baby prep, prenatal classes, or just enjoy feeling more like yourself.

Your Belly Grows, and So Does Everything Else

Weight gain picks up noticeably during this trimester. Most women switch to maternity clothes somewhere around weeks 14 to 16, and the belly becomes more visible week by week. As your uterus expands, it shifts your center of gravity, which puts new pressure on your back, hips, and pelvis.

Breast Changes

Your breasts may become less tender than they were in the first trimester, but they continue to grow as milk glands develop. You might notice small bumps appearing around the nipples, and some women begin leaking colostrum (the early form of breast milk) during this stage.

Skin Changes

This is when many women notice the most visible skin changes:

• Stretch marks on the stomach and breasts as skin expands
• Linea nigra, a dark vertical line running down the abdomen
• Pregnancy mask (melasma), darker patches appearing on the face
• Dry or itchy skin, especially over the growing belly
• Increased sun sensitivity, so SPF becomes especially important

Keeping skin well moisturized can help with itching, though it won't prevent stretch marks entirely. Most skin changes fade after birth.

The "Pregnancy Glow" Is Real

Increased blood flow and shifting hormones can give skin a genuine glow during the second trimester. It's most common around weeks 16 to 24, and it's one of the more enjoyable side effects of this stage.

Common Second Trimester Symptoms

Not everything about the second trimester is glowing skin and felt kicks. There are real physical symptoms that come with this stage, and knowing what to expect makes them much easier to manage. For a deeper look at relief strategies across all trimesters, the common physical discomforts in pregnancy guide covers each one in detail.

Back, Hip, and Pelvic Pain

As your belly grows, your posture shifts to compensate. Pregnancy hormones also loosen the ligaments that support your joints, which can cause aching in the lower back, hips, and pelvis. Wearing supportive footwear, using a pregnancy pillow at night, and gentle stretching can all help.

Leg Cramps

Nighttime leg cramps are very common in the second trimester, often caused by pressure on blood vessels and nerves as the uterus grows. Sleeping on your side (particularly your left side) helps improve circulation and reduce their frequency.

Important: If you notice swelling, redness, or pain in just one leg, contact your doctor. These can be signs of deep vein thrombosis (DVT), which requires prompt medical attention.

Round Ligament Pain

As your uterus expands, the ligaments that support it stretch, causing mild cramping or sharp twinges in the lower abdomen. This is called round ligament pain and is completely normal, though it can catch you off guard.

Braxton Hicks Contractions

This is your uterus "practicing" for labor. Braxton Hicks feel like a tightening or hardening of the belly, usually irregular and not painful. If contractions become regular, intensify, or are accompanied by other symptoms, call your doctor to rule out preterm labor.

Nasal Congestion and Nosebleeds

Increased blood flow to the mucous membranes of the nose and mouth can cause stuffiness and occasional nosebleeds. Bleeding or swollen gums are also common for the same reason, which is why scheduling a dental checkup during this trimester is a good idea.

Loose Teeth

Hormonal changes can affect the ligaments in your jaw, making teeth feel slightly loose. This is temporary and resolves after birth, but it's worth mentioning to your dentist.

Urinary Tract Infections (UTIs)

As the uterus grows, it puts pressure on the bladder, making it harder to fully empty. This increases the risk of UTIs. Watch for burning during urination, an unusual smell, or a persistent urge to go, and seek care promptly if any of these appear.

Changes in Sex Drive

Many women find their libido returns in the second trimester after a quiet first trimester. Increased blood flow can also make sex feel more pleasurable. Unless your doctor has advised otherwise, sexual activity is generally safe throughout this stage.

Week-by-Week Guide: Weeks 14 to 27

Here's what's typically happening each week during the second trimester, both for your baby and for you.

A Note on Baby Kicks

Most women feel fetal movement for the first time somewhere between weeks 16 and 22. The first movements often feel like flutters, bubbles, or a gentle popping sensation, sometimes called quickening. By week 21, they become more recognizable as kicks and nudges. If you're not feeling movement by weeks 22 to 24, mention it at your next prenatal appointment.

By week 17, your baby can already hear your voice. Talking, reading aloud, or playing music isn't just sweet; it's actually meaningful to your developing baby.

Prenatal Care in the Second Trimester

Prenatal appointments are typically scheduled monthly during this stage. These visits track your baby's growth, monitor your blood pressure and weight, and give you a chance to raise any concerns.

Key Appointments and Tests

For a full breakdown of every test and what it's checking for, see the pregnancy tests and screenings guide by trimester. The highlights for the second trimester:

• Anatomy scan (weeks 18-22): The most detailed ultrasound of your pregnancy. It checks your baby's organs, measurements, and position, and can usually reveal the sex if you want to know.
• Amniocentesis (weeks 15-20): An optional test that checks for chromosomal abnormalities like Down syndrome. Your provider will help you decide if it's right for you.
• Fundal height measurements (from week 20): At each visit, your provider measures from your pubic bone to the top of your uterus to track your baby's growth.
• Glucose screening (around weeks 24- 28): Tests for gestational diabetes, which is common and manageable when caught early.

When to Call Your Doctor

Don't wait for your next scheduled appointment if you experience any of the following (a full list of warning signs is also outlined by the Office on Women's Health):

• Leaking fluid from the vagina
• Vaginal bleeding
• Painful or burning urination
• Swelling, redness, or pain in one leg
• Regular or painful contractions before week 37
• Severe or persistent abdominal pain
• Significant decrease in fetal movement after week 22

These symptoms don't always signal something serious, but they always deserve a prompt call.

Taking Care of Your Mental Health Too

The physical changes get most of the attention, but the second trimester brings a significant emotional load as well. The pregnancy becomes undeniably real, which can bring up a complicated mix of excitement, anxiety, identity shifts, and even grief, especially for women who have experienced loss before.

It's completely normal to feel overwhelmed, even during what's supposed to be the "easy" trimester. Brain fog, mood fluctuations, and pregnancy-related anxiety are real experiences that deserve support, not just reassurance that everything is fine.

Some things that genuinely help:

• Talking to someone who understands, whether that's a partner, a friend, a therapist, or a supportive community
• Gentle movement like swimming or walking, which supports both physical and emotional wellbeing
• Building a routine around sleep, nutrition, and small moments of calm
• Not scrolling through worst-case scenarios at 2am (easier said than done, we know)

If you're looking for support that's available any time and doesn't require scheduling an appointment, Soula offers AI-powered mental health support designed specifically for women, including those navigating pregnancy. It's private, judgment-free, and there when you need it most. If you want to understand what's normal versus what deserves attention, this guide on anxiety during pregnancy is worth reading alongside this one.

Frequently Asked Questions About the Second Trimester

When does the second trimester start and end?

The second trimester runs from week 13 through week 27 of pregnancy. It follows the first trimester (weeks 1-12) and precedes the third trimester (weeks 28-40).

Is it normal to feel better in the second trimester?

Yes, for most women, the second trimester brings noticeable relief. Nausea and vomiting tend to ease significantly, energy levels return, and mood often stabilizes as hormones level out. That said, every pregnancy is different, and some women continue to feel nauseous or fatigued throughout.

When will I feel my baby move?

Most women feel fetal movement for the first time between weeks 16 and 22. First-time moms often feel it closer to weeks 20 to 22, while women who have been pregnant before may notice it earlier. The first movements often feel like flutters or gentle bubbles.

Is cramping normal in the second trimester?

Mild cramping is common and usually caused by round ligament pain as the uterus grows. Braxton Hicks contractions (irregular tightening of the belly) are also normal. However, cramping that is severe, persistent, or accompanied by bleeding, fever, or fluid leaking should be evaluated by your doctor right away.

Can I exercise during the second trimester?

For most women, exercise is not only safe but actively recommended during the second trimester. Low-impact activities like walking, swimming, prenatal yoga, and cycling are all excellent choices. Always check with your provider before starting a new exercise routine, especially if you have any pregnancy complications.

What is the anatomy scan, and when does it happen?

The anatomy scan (also called the mid-pregnancy ultrasound) is typically scheduled between weeks 18 and 22. It's a detailed ultrasound that checks your baby's organ development, size, and position. It usually lasts 20 to 45 minutes and is one of the most exciting appointments of the second trimester.

How much weight should I gain in the second trimester?

Weight gain recommendations vary based on your pre-pregnancy weight. On average, most women gain about 1 pound per week during the second trimester. Your provider will give you personalized guidance based on your starting weight and whether you're carrying multiples.

What foods should I eat in the second trimester?

Focus on nutrient-dense foods that support your baby's development. Key nutrients include calcium (dairy, leafy greens), iron (lean meat, legumes), folic acid (fortified foods, leafy greens), omega-3 fatty acids (salmon, walnuts), and vitamin D. Most providers recommend continuing prenatal vitamins throughout pregnancy.

Is it safe to have sex in the second trimester?

Yes, for most women, sex is safe throughout the second trimester. Many women also find their libido returns during this stage. If your doctor has identified any complications such as placenta previa, a short cervix, or a history of preterm labor, they may advise against it, so it's worth asking at your next appointment.

What warning signs should I watch for in the second trimester?

Contact your doctor promptly if you experience vaginal bleeding, leaking fluid, painful urination, swelling or pain in one leg, severe abdominal pain, regular contractions before 37 weeks, or a noticeable decrease in fetal movement after week 22.

What if I'm feeling anxious throughout my pregnancy?

Anxiety during pregnancy is more common than most people realize, and it often goes unacknowledged. If worry is taking up a lot of mental space, you're not alone, and it's worth addressing. The guide on anxiety during pregnancy explains what's normal, what deserves attention, and how to get support.