The Second Trimester: What to Expect, Week by Week

Many people call the second trimester the honeymoon of pregnancy. Morning sickness often eases, energy returns and the bump starts to show. For a lot of parents-to-be, weeks 13 to 27 are when pregnancy starts to feel real in a happy way rather than an exhausting one: clothes begin to fit differently, friends start to notice, and somewhere along the way comes that first tiny flutter that makes you stop mid-sentence and put a hand on your belly.

That said, no two pregnancies follow the same script. Some people still feel queasy well into month four, and others find this stretch brings new aches of its own. This guide walks through the second trimester in two halves, with what many parents notice, what appointments usually happen and a few gentle ways to look after yourself. Think of it as a calm companion, not a checklist you have to match.

Weeks 13–20

The start of the second trimester is often marked by a welcome shift in how you feel. As hormone levels settle, many people find nausea fading and appetite returning. You may notice more energy in the afternoons, and naps may feel less urgent than they did in the early weeks.

Your body is also changing in visible ways. The uterus rises above the pelvic bone, so a small bump often appears somewhere in this window, earlier for some people and later for others, especially in a first pregnancy. Many parents start to need looser waistbands or maternity clothes, and some notice changes in their skin, such as a darker line down the middle of the belly or slightly darker patches on the face. These are common and often fade after birth.

You may feel the first movements, often described as flutters or bubbles, sometime between weeks 16 and 22. In a first pregnancy, it is often closer to the later end of that range. Those early movements can be so light that they feel like hunger or gas, and it is common to second-guess them for a while before you are sure.

Appointments in this stretch

Prenatal visits usually continue about once a month during the second trimester. At each one, your provider will typically check your blood pressure and weight, measure the growth of your belly and listen to the baby’s heartbeat. Depending on your history and preferences, your care team may also talk with you about optional screening tests. Ask as many questions as you like about what each test is for and what the results can and cannot tell you.

Every pregnancy is different. Comparing week by week with friends causes more worry than it helps.

Hannah Pryce, certified nurse-midwife

That advice is worth keeping in mind as you scroll through pregnancy apps and group chats. Your cousin may have felt kicks at 15 weeks; your neighbor may not have noticed anything until 23. Both can be perfectly normal. If something about your own pregnancy worries you, your doctor or midwife is always the right person to ask.

Weeks 21–27

Your mid-pregnancy anatomy scan usually happens around week 20. During this ultrasound, a technician looks closely at the baby’s growth and development, along with the placenta and amniotic fluid. Many parents find it an emotional appointment, since it is often the clearest look at the baby so far. If you want to find out the sex, this is a common time to learn it, though you can always ask the technician to keep it a surprise.

It is a good time to plan childbirth classes. Many hospitals and birth centers offer classes that cover labor, pain relief options, breastfeeding and newborn care, and popular sessions can fill up weeks in advance. Some families also use this stretch to tour their hospital or birth center, start a baby registry and talk about parental leave at work.

Movements usually become stronger and more regular in these weeks. You may notice patterns, such as more activity after meals or when you lie down at night. Partners can often feel kicks from the outside by now, which tends to be a memorable moment for everyone. Some families like to talk or read aloud to the bump, since many babies can begin to hear sounds from the outside world around this stage.

Common discomforts

As the baby grows, new aches can appear. Round ligament pain, a brief sharp feeling low on one or both sides of the belly, is common when you stand up or turn quickly. Some people notice back pain, leg cramps at night, heartburn or a stuffy nose. Gentle stretching, staying hydrated, smaller meals and changing positions slowly can help. Always check with your provider before taking any medicine, even familiar over-the-counter products.

Looking after yourself

With more energy, the second trimester can be a good time to build habits that carry you through the rest of pregnancy. Many providers encourage regular, moderate activity, such as walking, swimming or prenatal yoga, as long as your own doctor or midwife says it is safe for you. Balanced meals with plenty of fruits, vegetables, whole grains and protein help support both you and the baby.

Rest still matters. Many people find their sleep changes as the bump grows, so this is a good time to set up a comfortable sleep position before the third trimester arrives. Emotional health matters too. It is normal to feel excited one day and anxious the next. If low moods, worry or sadness last more than a couple of weeks, tell your provider. Support is available, and asking for it is a strong, sensible thing to do.

Quick tips

Here are a few simple habits that many parents find helpful during weeks 13 to 27:

• Keep up with prenatal vitamins
• Sleep on your side with a pillow between your knees
• Write down questions for each appointment
• Drink water steadily through the day, not all at once
• Sign up for childbirth classes before they fill up

Keeping a running note on your phone for questions is especially handy. Appointments can feel rushed, and it is easy to forget the thing you wondered about at 2 a.m. three nights ago. Bring the list, read from it and do not worry about taking up the provider’s time. Answering questions is part of their job.

Key takeaway: the second trimester is often the most comfortable stretch of pregnancy, but every body moves at its own pace, so lean on your own care team rather than comparing timelines.

When to call your provider

Most changes in the second trimester are normal, but some signs need a prompt call to your doctor or midwife. These include vaginal bleeding, fluid leaking, regular cramping or tightening, severe headaches, vision changes, sudden swelling of the face or hands, fever, or a noticeable decrease in the baby’s movements once you have started feeling them regularly. If something just feels wrong, call. Your care team would much rather hear from you about something minor than have you wait at home with a worry.

Enjoy this middle stretch as much as you can. Take the bump photos, rest when you need to and let yourself be excited. The third trimester will bring its own preparations soon enough.

This article is general information, not medical advice. Talk to your own doctor or midwife about your family.