At 14 weeks pregnant you are a little over 3 months along, at the start of the second trimester, with about 26 weeks to go until your estimated due date.
At 14 weeks pregnant many people start to feel more like themselves: the Office on Women’s Health says you might notice nausea and fatigue going away in the second trimester, and UPMC calls it often the most energetic and pleasant one.
This guide covers your trimester, your baby, symptoms, tests, sleep and when to call. Every clinical detail was read in October 2026 on the primary sources named in the text.
Key Takeaways
14 weeks pregnant is a little over 3 months, or 12 weeks after conception (Mayo Clinic), with about 26 weeks to go.
Under the ACOG definition UPMC uses, the second trimester starts at 14 weeks, 0 days; OWH and Cleveland Clinic start it at week 13.
Mayo Clinic puts the baby at almost 3 1/2 inches crown to rump and about 1 1/2 ounces, with a more defined neck.
Energy often returns and nausea often eases, but not for everyone. Round ligament pain usually shows up in weeks 14 to 27 (Cleveland Clinic).
The quad screen window is weeks 15 to 22 and the anatomy ultrasound comes around week 20 (MedlinePlus).
Table of Contents
14 Weeks Pregnant at a Glance
Quick Answer
At 14 weeks pregnant you are a little over 3 months along, early in your 4th month, with about 26 weeks to go. Under the ACOG definition UPMC uses, this is the first week of the second trimester. Mayo Clinic puts the baby at almost 3 1/2 inches crown to rump and about 1 1/2 ounces.
14 weeks pregnant
What to know
Trimester
Second trimester. ACOG (as reported by UPMC) starts it at exactly 14 weeks, 0 days, so this is its first week. Other sources start it at week 13. See the table below.
Month
A little over 3 months, so you are early in your 4th month. This counts 4 weeks and a few days per month. Months are a convention, not a medical unit.
Weeks to go
About 26 (40 minus 14, counted from the first day of your last menstrual period).
Baby’s size
Almost 3 1/2 inches (87 mm) crown to rump and about 1 1/2 ounces (45 g), per Mayo Clinic.
Common symptoms
More energy, easing nausea, round ligament pain, a stuffy nose or nosebleeds, bleeding gums.
This week’s care focus
Planning second trimester screening: the quad screen window opens at week 15 (MedlinePlus, UPMC).
14 weeks pregnant: quick facts with sources.
How the weeks are counted. Pregnancy is dated from the first day of your last menstrual period (LMP), not from conception. Mayo Clinic says your provider counts ahead 40 weeks from the start of your last period, so you are not actually pregnant for the first week or two; it describes week 14 as 12 weeks after conception. Cleveland Clinic says an ultrasound can lead your provider to change your due date, usually by only a few days. If yours was adjusted, go by the new date.
Is 14 weeks the second trimester? Yes, on every definition we checked, but sources start the count at different points:
Source
Second trimester
Where week 14 falls
American College of Obstetricians and Gynecologists (ACOG), as reported by UPMC
14 weeks, 0 days through 27 weeks, 6 days
First week of the second trimester
Office on Women’s Health (OWH)
Week 13 to week 28
Second week of the second trimester
Cleveland Clinic
Week 13 through the end of week 27
Second week of the second trimester
Trimester definitions differ by source, so all three are printed.
Your Baby’s Development at 14 Weeks
UPMC says the fetus grows rapidly in size during the second trimester, building on the structures that formed in the first trimester. Here is what the primary sources tie to this stretch of weeks:
Source and timing
What it says is happening
Mayo Clinic, week 14 (12 weeks after conception)
The neck has become more defined, and red blood cells are forming in the spleen.
Mayo Clinic, week 15 (13 weeks after conception)
The baby is growing quickly and bone development continues. Soon bones will be visible on ultrasound images.
Mayo Clinic, week 16 (14 weeks after conception)
The head is upright, the eyes can move slowly, and the ears are close to their final position. Limb movements are becoming coordinated and can be seen on ultrasound.
Fetal development around week 14, by source.
Can you tell the sex yet? Cleveland Clinic says the sex can often be determined around 20 weeks on the second trimester ultrasound.
How Big Is Your Baby at 14 Weeks?
Mayo Clinic gives a figure for week 14 itself. The Office on Women’s Health gives figures for weeks 12 and 16, which bracket it. Each is printed as the source wrote it:
Source
Week
Length
Weight
Office on Women’s Health
12
About 3 inches
Almost an ounce
Mayo Clinic
14
Almost 3 1/2 inches (87 mm), crown to rump
About 1 1/2 ounces (45 g)
Office on Women’s Health
16
About 4 to 5 inches
Almost 3 ounces
Mayo Clinic
16
About 4 3/4 inches (120 mm), crown to rump
About 4 ounces (110 g)
Baby size near 14 weeks. Sources differ, so each is printed.
Why the numbers differ. Mayo Clinic measures crown to rump, from the top of the head to the bottom, which leaves out the legs. OWH does not say how it measures. Healthy babies vary.
A fruit comparison? UPMC says that at the beginning of the second trimester the fetus is about the size of a peach.
A 14 week ultrasound? Not every pregnancy has a scan this week. MedlinePlus says the ultrasound to assess the baby’s anatomy is usually scheduled around 20 weeks.
14 Weeks Pregnant Symptoms
Many people feel better at 14 weeks pregnant. UPMC describes the second trimester as often the most energetic and pleasant one, and Cleveland Clinic says you may notice a burst of energy. You may have some, all or none of these:
Symptom
What the sources say
What can help
Easing nausea
UPMC says morning sickness is usually over by now, but Cleveland Clinic notes some people feel sick well into the second trimester.
If you still feel sick, UPMC says to talk to your doctor.
Bigger appetite
Cleveland Clinic lists an increased appetite.
UPMC says you need about 340 more calories a day in the second trimester.
Round ligament pain
Cleveland Clinic says it usually occurs in the second trimester (weeks 14 through 27): aches, cramps, or a sharp, stabbing or pulling feeling in the belly, hips or groin, often with sudden movements.
See the tips below.
Stuffy nose or nosebleeds
Cleveland Clinic lists nosebleeds or nasal congestion, due to hormones.
Mention it at your visit if it bothers your sleep.
Bleeding gums
Cleveland Clinic lists bleeding gums, due to hormones.
Keep up brushing and dental visits, and tell your dentist you are pregnant.
Common symptoms at 14 weeks, as sourced.
Round ligament pain tips. Cleveland Clinic suggests wearing an elastic belly band, gentle stretching or yoga, rest, a warm (not hot) bath, and holding your belly or bending your hips when you sneeze, cough or laugh. Check with your provider before taking any pain medicine, and see the warning signs below.
Still sick? That happens. Severe nausea and throwing up is on the CDC’s list of urgent maternal warning signs, so call if you cannot keep food or fluids down.
Baby on the way? Get ahead on sleep.
Our free two-minute quiz builds a gentle, personalized sleep plan you can use from the first weeks at home.
Are you showing at 14 weeks? Maybe, maybe not. UPMC says that in the second trimester body changes become much more noticeable and you start to show. Cleveland Clinic says you might start developing an enlarged belly, and not to worry if you do not have a bump right away. Bodies vary, so a small bump or no bump at all tells you little on its own. Our pregnant belly by month guide shows the usual progression.
Over the second trimester the Office on Women’s Health says you may notice body aches (back, abdomen, groin or thigh), stretch marks, darker skin around the nipples, a line from the belly button to the pubic hairline (Cleveland Clinic calls it the linea nigra), darker patches on the face, tingling hands, itching, and swelling of the ankles, fingers and face. Extreme swelling of your hands or face is an urgent warning sign (CDC).
Eating for the second trimester. UPMC says you need about 340 more calories a day than before pregnancy, which is closer to an extra snack than a second dinner. Keep taking the supplement your provider recommended; our prenatal vitamins guide explains what is in one.
Prenatal Care, Tests and Appointments Around Week 14
MedlinePlus says you will have a prenatal visit every month in the second trimester; UPMC says every four weeks, and more often for high risk pregnancies. At these visits MedlinePlus says your provider checks your weight and blood pressure, measures your abdomen to track the baby’s growth, sometimes tests your urine for sugar or protein, and makes sure certain vaccinations are done.
Test
Window
What it is
Source
Amniocentesis
Between 14 and 20 weeks
A test of the fluid around the baby, if you and your provider decide it is right for you.
MedlinePlus
Quadruple (quad) screen
Blood drawn between weeks 15 and 22, most accurate at 16 to 18
A screening blood test.
MedlinePlus, UPMC
Anatomy ultrasound
Around 20 weeks
A detailed look at the baby’s anatomy. Cleveland Clinic says the sex can often be determined around 20 weeks.
MedlinePlus, Cleveland Clinic
Glucose screening
Between weeks 24 and 28
Checks for gestational diabetes.
UPMC
Tests near week 14, as read in October 2026.
Screening vs diagnostic. MedlinePlus says quad screen results do not diagnose a problem or disease; they help your provider decide whether more testing is needed. Ask which tests are recommended for you and what each can tell you.
Vaccines. MedlinePlus says your visits include making sure certain vaccinations are done. Guidance changes, so ask which vaccines your provider recommends for you now (October 2026) and which come later.
What to Do This Week: A Simple Checklist
Decide whether you want second trimester screening, and ask when to book the quad screen if you do (its window opens at week 15).
Ask your provider when your anatomy ultrasound will be scheduled (MedlinePlus says around 20 weeks).
Write down questions for your next monthly visit.
Move most days if your provider agrees: Cleveland Clinic suggests about 20 minutes of exercise a day, names walking and swimming among the safest options, and says to avoid contact sports and activities where you could fall.
Start avoiding long stretches flat on your back, which Cleveland Clinic advises in the second trimester.
Shop for a supportive bra and a belly band if round ligament pain or a growing belly is bothering you.
Save your provider’s after-hours number. Feeling foggy? See pregnancy brain.
Sleep at 14 Weeks Pregnant
Sleep position. Cleveland Clinic’s second trimester guidance is to sleep on your side instead of your back at night, as this is best for your circulation, and to avoid lying on your back for extended periods. If you wake up on your back, simply roll back onto your side.
Try a pillow now: a supportive pillow can make side sleeping more comfortable. Our guide on how to use a pregnancy pillow compares the shapes.
Call any time something worries you. MedlinePlus and UPMC say to contact your provider for:
Any vaginal bleeding (UPMC notes it could signal an issue with the placenta).
Moderate or severe cramping or low abdominal pain.
Increased vaginal discharge, or discharge with an odor.
A fever, chills, or pain when you urinate.
Round ligament pain that does not go away after a few hours (Cleveland Clinic).
Any new medicine, vitamin or herb you are thinking about taking.
Urgent maternal warning signs. The CDC’s Hear Her campaign says to seek medical care immediately if you have any of these:
A headache that will not go away or gets worse over time.
Dizziness or fainting.
Changes in your vision.
A fever of 100.4 F or higher.
Extreme swelling of your hands or face.
Thoughts about harming yourself or your baby.
Trouble breathing.
Chest pain or a fast-beating heart.
Severe nausea and throwing up.
Severe belly pain that does not go away.
Vaginal bleeding or fluid leaking during pregnancy.
Severe swelling, redness or pain of your leg or arm.
Overwhelming tiredness.
The CDC suggests asking your provider at what point you should go to the emergency room or call 911. If you think you are having a medical emergency, such as severe chest pain, severe trouble breathing, heavy bleeding or fainting, call 911. When you call, say you are 14 weeks pregnant. This article is general education, not medical advice.
Frequently Asked Questions
How many months is 14 weeks pregnant?
A little over 3 months, which puts you early in your 4th month, counting 4 weeks and a few days per month. You have about 26 weeks to go until your estimated due date. Months are only a convention, which is why providers count in weeks.
Is 14 weeks pregnant the second trimester?
Yes. UPMC, using the American College of Obstetricians and Gynecologists definition, says you are officially in the second trimester at 14 weeks and 0 days, so this is its first week. The Office on Women’s Health and Cleveland Clinic start it at week 13, making this its second week.
How big is a baby at 14 weeks?
Mayo Clinic says that at 14 weeks the baby might be almost 3 1/2 inches (87 millimeters) long from crown to rump and weigh about 1 1/2 ounces (45 grams). UPMC compares the start of the second trimester to a peach. Healthy babies vary.
Should I be showing at 14 weeks?
Not necessarily. UPMC says body changes become much more noticeable in the second trimester and you start to show, but Cleveland Clinic says not to worry if you do not have a bump right away. Bodies vary a lot at this stage.
What does round ligament pain feel like?
Cleveland Clinic describes aches, cramps, spasms, or a sharp, stabbing or pulling feeling in the belly, hips or groin, often with sudden movements. It usually occurs in weeks 14 through 27. Call your provider if it lasts more than a few hours or comes with bleeding or fever.
What tests happen around 14 weeks pregnant?
MedlinePlus says amniocentesis, if you choose it, can be done between 14 and 20 weeks, and the quad screen blood test is drawn between weeks 15 and 22. The anatomy ultrasound is usually around 20 weeks. Ask your provider which tests fit you.
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