Pregnancy week 29 places you firmly in the third trimester, with approximately 11 weeks remaining until a 40-week estimated due date.

The fetus is now well formed, but the final weeks of pregnancy remain extremely important. The focus is increasingly shifting toward rapid weight gain, organ maturation, brain development, stronger movement and preparation for life after birth.

Week 29 also begins a new fetal-development stage. ACOG groups weeks 29–32 together as a period when the fetus can stretch, kick and make grasping movements, the eyes can detect changes in light, bone marrow produces red blood cells, scalp hair may be present and lanugo begins disappearing.

Quick answer: At 29 weeks pregnant, the fetus is around 38.6 cm from head to heel, approximately the size of a butternut squash according to NHS guidance. The fetus is already well formed but still needs to mature its organs and gain substantial fat. Movement is usually strong, sleep and waking patterns are more noticeable, and eyes are becoming able to detect changes in light.

Is 29 Weeks Pregnant in the Third Trimester?

Yes.

ACOG defines the third trimester as beginning at 28 weeks 0 days and continuing through 40 weeks 6 days.

At week 29, third-trimester development increasingly emphasizes:

• weight gain;
• brain and nervous-system maturation;
• continued lung development;
• red-blood-cell production;
• stronger movement;
• fat accumulation;
• maturation of organs already formed.

The fetus may look increasingly like a newborn, but important development is still happening every day.

How Big Is the Baby at 29 Weeks?

The NHS estimates the fetus at around 38.6 cm from head to heel.

That is approximately the size of a butternut squash.

This is an average rather than a growth target.

Fetal size naturally varies according to:

• genetics;
• exact gestational age;
• fetal sex;
• individual growth pattern;
• measurement technique.

Your healthcare professional interprets growth using clinical measurements and ultrasound when needed.

What Is Developing at 29 Weeks Pregnant?

ACOG describes weeks 29–32 as a developmental period when:

• the fetus can stretch and kick;
• grasping movements occur;
• the eyes can sense changes in light;
• bone marrow forms red blood cells;
• scalp hair may be present;
• lanugo begins disappearing.

The NHS summarizes week 29 by explaining that the fetus is now well formed, while the coming weeks are especially important for organ maturation and fat gain.

Is the Baby Fully Developed at 29 Weeks?

Not fully.

Many major structures are already formed, but formation and maturity are not the same thing.

At week 29, the:

• brain continues developing;
• lungs remain immature;
• nervous system continues maturing;
• fat stores continue increasing;
• organs continue preparing for independent function.

This distinction is important because a fetus that looks recognizably baby-like still has substantial development ahead.

Is the Baby Gaining Weight Quickly?

Yes.

The third trimester is the period in which fetal weight increases substantially.

ACOG describes the third trimester as the stage when fetal weight rises and organs mature in preparation for functioning after birth.

The NHS also notes that from week 29 onward, one of the fetus’s major jobs is gaining fat.

Why Is Fetal Fat Important?

Fat supports several functions after birth, including:

• body-temperature regulation;
• energy storage;
• smoother skin;
• fuller body shape.

Earlier in pregnancy the fetus had relatively little fat beneath the skin.

That changes progressively through the third trimester.

Can the Baby Stretch and Kick at 29 Weeks?

Yes.

ACOG specifically identifies stretching and kicking as features of the weeks 29–32 developmental stage.

Movements may now feel like:

• powerful kicks;
• rolls;
• stretches;
• pushing;
• whole-body shifts;
• smaller rapid movements.

As uterine space gradually becomes tighter, the type of movement may change later, but movement should not simply stop.

Can the Baby Make Grasping Movements?

Yes.

ACOG notes that grasping motions occur during weeks 29–32.

This reflects continuing development of:

• hand muscles;
• nerves;
• brain-to-muscle coordination;
• reflexes.

These are developmental movements rather than deliberate object-grasping like a newborn would perform.

Should You Feel Movement Every Day at 29 Weeks?

By this stage, many pregnant people are familiar with their baby’s normal movement pattern.

The NHS specifically recommends learning your baby’s usual pattern and contacting your midwife or hospital if movements change or stop.

There is no single movement pattern that every fetus must follow.

What matters is what is normal for your pregnancy.

Does the Baby Move Less Because There Is Less Space?

Movement can feel different as pregnancy progresses, but reduced space is not a reason to ignore a meaningful reduction in fetal activity.

You may notice more:

• rolls;
• stretches;
• pushes;

instead of some of the freer movements from earlier pregnancy.

However, if your baby’s normal pattern changes noticeably, contact your maternity service.

Should You Use a Home Doppler if Movement Seems Reduced?

No.

Finding a heartbeat at home does not prove that fetal wellbeing is normal.

A home Doppler can also create false reassurance if maternal or placental sounds are mistaken for fetal cardiac activity.

If movement changes significantly, contact your maternity healthcare service instead.

Does the Baby Have a Sleep–Wake Pattern?

Yes.

The NHS notes that babies have their own sleeping and waking patterns and may become particularly active just when the pregnant person wants to sleep.

This may explain why movement sometimes feels strongest:

• at night;
• while lying quietly;
• when sitting still.

You are also more likely to notice movement when you are not distracted by activity.

Can the Baby’s Eyes Sense Light at 29 Weeks?

Yes.

ACOG states that during weeks 29–32 the eyes can sense changes in light.

The eyes are not functioning like mature newborn eyes, but the visual system is becoming increasingly responsive.

Development still continues in:

• the retina;
• optic nerves;
• visual areas of the brain.

Should You Shine a Flashlight on the Belly?

There is no medical need to do this.

Normal environmental light is enough.

Avoid deliberately using very bright light as a “stimulation” technique.

Fetal vision develops naturally without special exercises.

Is the Baby’s Brain Still Growing Rapidly?

Yes.

Rapid brain development that began earlier continues into the third trimester.

Increasing neurological complexity supports:

• movement coordination;
• sensory processing;
• sleep regulation;
• reflexes;
• responses to sound and light.

Brain maturation continues even after birth.

Is Bone Marrow Making Red Blood Cells?

Yes.

ACOG states that during weeks 29–32 bone marrow forms red blood cells.

This is an important developmental transition.

Earlier in fetal development, organs such as the liver had a larger role in blood-cell production.

The bone marrow increasingly assumes the role it will continue after birth.

Why Are Red Blood Cells Important?

Red blood cells contain hemoglobin, which carries oxygen.

Before birth, oxygen comes from the placenta rather than the lungs.

Fetal red blood cells transport that oxygen throughout the developing body.

Does the Baby Have Hair at 29 Weeks?

Possibly.

ACOG notes that the head may have some hair during weeks 29–32.

Hair varies considerably between fetuses.

The amount of fetal scalp hair does not reliably predict whether the newborn will have thick or sparse hair.

Is Lanugo Disappearing?

Yes, this process begins during the weeks 29–32 period.

ACOG states that lanugo—the fine hair that covered the fetus—begins disappearing.

The NHS also notes that the soft downy hair and protective vernix that have covered the fetus begin gradually disappearing around this stage.

Does All Lanugo Disappear Before Birth?

Not always.

Some babies, especially those born earlier, may still have visible lanugo after birth.

The amount generally decreases as pregnancy progresses.

Is Vernix Disappearing Too?

The NHS notes that the protective greasy white vernix begins reducing around this stage.

Vernix has helped protect fetal skin from prolonged exposure to amniotic fluid.

Some vernix may still be present at birth.

Are the Lungs Mature at 29 Weeks?

No.

Lung development continues during the third trimester.

Although substantial structural development and surfactant production have already occurred, lung maturity is not complete.

The fetus continues to receive oxygen through the placenta.

Is Surfactant Still Increasing?

Yes.

Surfactant production began earlier and continues increasing as pregnancy advances.

Surfactant helps lung air sacs remain open after birth.

Greater maturity later in pregnancy generally improves the ability of the lungs to function independently.

Does the Baby Practice Breathing?

Yes.

Breathing-like movements continue.

These movements help prepare:

• respiratory muscles;
• the diaphragm;
• chest movement;
• developing lung structures.

They do not involve breathing air.

Is the Baby’s Digestive System Working?

The fetal digestive system has been functioning for several weeks.

The fetus:

• swallows amniotic fluid;
• processes material through the gastrointestinal tract;
• continues accumulating meconium.

Nutrition itself still comes through the placenta.

What Is Happening in Your Body at 29 Weeks?

The uterus is now large enough to affect several body systems.

The NHS highlights:

• breathlessness;
• leg cramps;
• frequent nighttime urination;
• sleep disruption;
• balance changes.

These symptoms may become more noticeable as the third trimester advances.

Why Might You Feel Breathless?

The NHS notes that the growing fetus can push upward toward the lungs, while carrying extra pregnancy weight also increases physical demand.

Mild breathlessness with activity can occur.

However, sudden, severe or unexplained breathing difficulty should not simply be blamed on pregnancy.

When Is Breathlessness Concerning?

Seek urgent medical care if breathlessness:

• starts suddenly;
• becomes severe;
• occurs with chest pain;
• occurs while resting;
• is accompanied by fainting;
• feels substantially different from your usual pregnancy breathlessness.

Why Are You Urinating More at Night?

The NHS notes that fetal pressure on the bladder can increase nighttime bathroom trips.

This can worsen sleep disruption.

Continue adequate hydration rather than severely restricting fluids to avoid urination.

Are Leg Cramps Common at 29 Weeks?

Yes.

The NHS specifically notes that leg cramps may occur around this stage.

Gentle stretching may help ordinary cramps.

Seek urgent medical assessment if one leg becomes:

• significantly swollen;
• red;
• warm;
• persistently painful.

Those features require assessment for other causes.

Why Is Sleep Difficult at 29 Weeks?

Possible reasons include:

• fetal activity;
• frequent urination;
• heartburn;
• leg cramps;
• larger abdomen;
• back discomfort;
• difficulty finding a comfortable position.

The NHS recommends resting when possible and supporting the body with pillows.

What Is the Best Sleeping Position?

The NHS recommends trying to go to sleep on your side in later pregnancy.

Pillows may help:

• under the bump;
• between the legs;
• behind the back.

If you wake on your back, simply reposition yourself onto your side.

Is It Normal to Be Very Tired?

Yes, tiredness can become more noticeable in the third trimester.

However, severe fatigue may also have other contributors, including:

• anemia;
• poor sleep;
• stress;
• illness.

If fatigue becomes difficult to cope with, discuss it with your healthcare professional.

What Symptoms Are Common at 29 Weeks?

Possible symptoms listed by the NHS include:

• sleep problems;
• swollen or bleeding gums;
• round-ligament pain;
• hemorrhoids;
• headaches;
• backache;
• indigestion;
• heartburn;
• bloating;
• constipation;
• leg cramps;
• feeling hot;
• dizziness;
• swollen hands and feet;
• urine infections;
• vaginal infections;
• skin pigmentation changes;
• oily skin;
• thicker hair.

Earlier pregnancy symptoms may also continue.

Is Backache Normal?

Yes.

The growing abdomen alters posture and increases strain on the back.

General measures may include:

• supportive footwear;
• careful lifting;
• gentle activity;
• avoiding prolonged awkward positions.

Severe, persistent or neurologically associated back pain requires assessment.

Is Heartburn Normal?

Yes.

The enlarging uterus and pregnancy hormones can increase reflux.

Helpful measures may include:

• smaller meals;
• eating slowly;
• avoiding personal trigger foods;
• remaining upright after eating.

Ask a pharmacist or clinician about pregnancy-safe medication if symptoms are troublesome.

Is Constipation Normal?

Yes.

Hormonal changes and physical pressure from pregnancy can slow digestion.

Helpful measures include:

• adequate water;
• fruit;
• vegetables;
• whole grains;
• legumes;
• appropriate exercise.

Are Hemorrhoids Common?

Yes.

Constipation and pelvic pressure can contribute to hemorrhoids.

Seek medical advice for:

• significant bleeding;
• severe pain;
• persistent symptoms.

Is Swelling Normal?

Mild swelling can occur.

However, sudden or significant swelling needs more caution—particularly with:

• severe headache;
• vision changes;
• pain under the ribs;
• feeling seriously unwell.

These can be warning signs of pre-eclampsia and require medical assessment.

Is Vaginal Discharge Normal?

White or milky pregnancy discharge can remain normal.

Seek medical advice for discharge that is:

• green or yellow;
• strongly unpleasant smelling;
• itchy;
• painful;
• associated with fever.

A gush or continuous watery leakage requires urgent assessment.

What About Bleeding?

The NHS advises obtaining medical advice for pregnancy bleeding.

Seek urgent care if bleeding is:

• heavy;
• accompanied by severe pain;
• associated with contractions;
• associated with fainting;
• accompanied by fluid leakage.

Can Braxton Hicks Contractions Happen at 29 Weeks?

Yes.

Irregular uterine tightening can occur during the third trimester.

Braxton Hicks contractions are generally:

• irregular;
• brief;
• not progressively stronger;
• not progressively closer together.

Regular painful contractions at 29 weeks require medical assessment because preterm labor must be considered.

What Are Warning Signs of Possible Preterm Labor?

Seek prompt maternity assessment for symptoms such as:

• regular painful contractions;
• persistent pelvic pressure;
• new persistent lower back pain;
• vaginal bleeding;
• watery fluid leakage;
• repeated cramping.

Do not attempt to distinguish true preterm labor from Braxton Hicks using an online article alone.

Is Gestational Diabetes Screening Finished by Week 29?

ACOG’s usual routine screening window is 24–28 weeks.

So by week 29, many pregnant people will already have completed screening.

If your healthcare provider recommended screening and it has not been done, contact them rather than assuming it is simply no longer necessary.

Testing decisions should be individualized.

What If Gestational Diabetes Was Diagnosed?

Management may include:

• nutrition changes;
• appropriate exercise;
• blood-glucose monitoring;
• medication when needed.

Your healthcare provider may also modify fetal monitoring depending on glucose control and other factors.

What About Anemia?

Anemia remains important in third-trimester care because pregnancy increases iron requirements.

Possible symptoms include:

• marked fatigue;
• weakness;
• dizziness;
• breathlessness.

These symptoms are not specific, so laboratory testing is needed for diagnosis.

Is Iron Important at 29 Weeks?

Yes.

Iron supports:

• maternal hemoglobin;
• fetal growth;
• oxygen transport.

Useful food sources include:

• meat;
• legumes;
• fortified cereals;
• leafy vegetables.

Additional iron supplements should be based on individual clinical guidance.

Does the Third Trimester Require More Calories?

Under NHS guidance, the third trimester may require around 200 additional calories per day—far less than “eating for two.”

The NHS gives an example roughly comparable to two slices of wholemeal toast with margarine.

Individual energy needs vary, so the important priority remains dietary quality.

What Should You Eat at 29 Weeks?

Aim for a varied diet containing:

• vegetables;
• fruit;
• whole grains;
• appropriate protein;
• calcium-rich foods;
• iron-rich foods;
• healthy fats;
• sufficient fluids.

There is no single food that guarantees fetal growth or prevents pregnancy complications.

Is Protein Important?

Yes.

Protein supports growth of:

• fetal tissues;
• placenta;
• maternal tissues.

Choose a variety of appropriate sources.

Is Calcium Important?

Yes.

Calcium supports ongoing fetal bone and muscle development.

It also helps protect maternal bone health.

Sources can include:

• dairy foods;
• fortified alternatives;
• calcium-rich plant foods.

Is Vitamin D Important?

Yes.

Vitamin D contributes to bone and muscle health.

Supplement recommendations differ by country and individual circumstances.

Follow your national guidance or healthcare professional’s advice.

Do Pregnancy Sex-Prediction Myths Work?

No.

The NHS specifically addresses several common myths at week 29 and notes there is no scientific basis for determining fetal sex from things such as bump shape or heart rate.

Does a High or Low Bump Predict a Boy or Girl?

No.

The appearance of the bump is influenced more by factors such as:

• body height;
• muscle tone;
• previous pregnancies;
• pregnancy anatomy.

Bump position does not scientifically predict fetal sex.

Does Fetal Heart Rate Predict Sex?

No.

The claim that heart rate above or below a certain number predicts fetal sex is not scientifically supported.

The NHS specifically rejects the idea that a heart rate above 140 beats per minute reliably indicates a girl.

Do Ring Tests Predict Baby Sex?

No.

Swinging a wedding ring above the abdomen has no scientific basis for determining fetal sex.

What About Online Gender Prediction Kits?

Be cautious.

The NHS notes that commercial kits may make claims based on urine or blood but warns that their reliability can be questionable.

If fetal sex is medically or personally relevant, validated testing or ultrasound performed in appropriate circumstances is more meaningful.

Is Whooping Cough Vaccination Still Relevant?

Vaccination recommendations depend on your country.

The current NHS week-29 guidance says pregnant people who have not yet received the pertussis vaccine should discuss it promptly with their clinician, because earlier vaccination gives more time for protective antibodies to be transferred to the fetus.

Follow your own country’s pregnancy immunization schedule.

Is RSV Vaccination Relevant?

The current NHS guidance notes that RSV vaccination is generally offered around week 28 and can be given later if required.

RSV vaccination policies vary between countries.

Follow local public-health and prenatal-care recommendations.

Can You Exercise at 29 Weeks?

Many people with uncomplicated pregnancies can remain active.

The NHS recommends around 150 minutes of activity per week during pregnancy.

You may need to adapt for:

• balance;
• fatigue;
• joint discomfort;
• larger abdominal size.

Possible activities include:

• walking;
• swimming;
• pregnancy-adapted exercise;
• appropriate strength work.

Are Pelvic Floor Exercises Important?

Yes.

The NHS recommends continuing pelvic-floor exercises to help reduce urinary leakage when:

• coughing;
• sneezing;
• laughing.

These muscles support the:

• bladder;
• uterus;
• bowel.

Should You Start a Birth Plan?

Yes, if you want one.

The NHS specifically suggests starting a birth plan around week 29.

You can consider preferences about:

• pain relief;
• birth support;
• who you want present;
• feeding;
• immediate newborn care.

A birth plan expresses preferences, not guarantees.

Should You Choose a Birth Partner?

This is a useful time to discuss who you would like supporting you during labor.

Your birth partner may help with:

• emotional reassurance;
• communication;
• comfort measures;
• practical support.

The role should reflect your preferences.

Are Antenatal Classes Useful Now?

Yes.

The NHS suggests asking your healthcare provider about antenatal classes.

Topics may include:

• labor;
• pain relief;
• cesarean birth;
• breastfeeding;
• newborn care;
• partner support.

Should You Prepare a Hospital Bag?

You do not need to have everything packed at exactly week 29, but it is a reasonable time to begin organizing.

Consider checking your birth facility’s requirements rather than relying only on generic online packing lists.

Can You Travel at 29 Weeks?

Travel may still be possible in an uncomplicated pregnancy, but practical restrictions become increasingly important.

Check:

• airline gestational-age rules;
• whether documentation is required;
• travel insurance;
• access to maternity care;
• your medical history.

Discuss significant travel with your prenatal provider.

Is Sex Safe at 29 Weeks?

For most uncomplicated pregnancies, sexual activity remains possible.

Seek individualized medical advice if you have:

• vaginal bleeding;
• fluid leakage;
• placenta-related complications;
• cervical concerns;
• regular painful contractions;
• medical advice to avoid intercourse.

What About Mental Wellbeing?

The NHS emphasizes that pregnancy can involve mixed emotions, including excitement and anxiety.

Speak with a healthcare professional if you experience:

• persistent anxiety;
• persistent low mood;
• difficulty coping;
• major sleep disruption because of worry.

Mental health is part of prenatal care.

When Should You Seek Medical Help at 29 Weeks?

Seek urgent professional assessment for:

• heavy vaginal bleeding;
• regular painful contractions;
• significant or continuing fluid leakage;
• severe abdominal or pelvic pain;
• meaningful reduction or stopping of fetal movement;
• severe headache;
• visual changes;
• sudden major swelling;
• severe pain under the ribs;
• fainting;
• chest pain;
• sudden or severe breathing difficulty;
• high fever;
• severe one-sided leg pain or swelling.

At 29 weeks, symptoms suggesting preterm labor, pre-eclampsia, ruptured membranes or reduced fetal movement require professional assessment.

Pregnancy Week 29 FAQs

How big is the baby at 29 weeks?

The NHS estimates the fetus at around 38.6 cm from head to heel, approximately the size of a butternut squash.

What is developing at 29 weeks?

The fetus can stretch, kick and make grasping motions, eyes can sense changes in light, bone marrow produces red blood cells, scalp hair may be present and lanugo begins disappearing.

Is the baby fully developed?

Major structures are formed, but the brain, lungs, nervous system and other organs still need important maturation before birth.

Can the baby sense light?

Yes. ACOG states that the eyes can detect changes in light during weeks 29–32.

Is bone marrow making red blood cells?

Yes. Bone marrow is producing red blood cells during this stage.

Is lanugo disappearing?

Yes. ACOG states that lanugo begins disappearing during weeks 29–32.

Should you feel movement every day?

Many people now know their baby’s usual movement pattern. Contact your maternity service if movements noticeably change or stop.

Is breathlessness normal at 29 weeks?

Mild breathlessness can occur as the growing uterus affects available space and carrying extra pregnancy weight increases physical demand. Sudden or severe breathlessness requires medical assessment.

Why do you urinate more at night?

The growing fetus can place additional pressure on the bladder, increasing nighttime bathroom trips.

Are leg cramps normal?

Yes. Leg cramps are common, although persistent one-sided swelling, redness, warmth or pain requires urgent assessment.

Can bump shape predict fetal sex?

No. NHS guidance states that bump shape does not scientifically predict whether the fetus is male or female.

Can fetal heart rate predict sex?

No. The commonly repeated “over 140 means a girl” claim is not scientifically supported.

Do you need additional calories at 29 weeks?

NHS guidance says around 200 additional calories per day may be needed in the third trimester—not double your normal food intake.

Is week 29 in the third trimester?

Yes. The third trimester begins at week 28.

What Comes Next?

During Pregnancy Week 30, rapid brain growth and organ maturation continue while fetal weight increases.

The weeks 29–32 developmental phase continues to feature:

• stronger kicking and stretching;
• grasping motions;
• light sensitivity;
• red-blood-cell production by bone marrow;
• scalp hair;
• gradual loss of lanugo.

Previous: Pregnancy Week 28
Next: Pregnancy Week 30
Tool: Pregnancy Due Date Calculator

Medical References

This article is based on current educational information from established medical and public-health organizations, including:

• NHS — 29 Weeks Pregnant
• American College of Obstetricians and Gynecologists (ACOG) — How Your Fetus Grows During Pregnancy
• ACOG — Changes During Pregnancy
• MedlinePlus — Fetal Development

Editorial & Medical Information

Last content review: October 2026

This page provides general educational pregnancy information only. It does not diagnose preterm labor, pre-eclampsia, reduced fetal movement, gestational diabetes, anemia or other pregnancy complications; prescribe medication; predict fetal wellbeing; or replace individualized prenatal care.

Pregnancy symptoms, movement patterns, vaccination recommendations and medical needs vary between individuals and healthcare systems. Contact a qualified maternity healthcare professional for concerns about fetal movement, contractions, bleeding, fluid leakage, severe pain, breathing difficulty, swelling or other pregnancy symptoms.

Conclusion

Pregnancy week 29 begins a distinct weeks 29–32 developmental phase. ACOG notes that the fetus can now stretch, kick and make grasping motions, while the eyes can detect changes in light, bone marrow produces red blood cells, scalp hair may be present and lanugo begins to disappear.

The NHS estimates the fetus at around 38.6 cm from head to heel and describes it as well formed, while emphasizing that the remaining weeks are important for organ maturation and gaining fat.

For the pregnant person, week 29 may bring increasing breathlessness, nighttime urination, leg cramps and difficulty sleeping. The fetus also has its own sleeping and waking patterns, which may explain why activity can seem strongest when you are trying to rest.

Third-trimester nutrition changes modestly rather than dramatically: NHS guidance suggests around 200 additional calories per day, reinforcing that pregnancy still does not mean “eating for two.”

Continue routine prenatal care, side sleeping, appropriate physical activity and awareness of your baby’s usual movement pattern. Heavy bleeding, regular painful contractions, fluid leakage, severe headache with visual changes, sudden major swelling, severe breathlessness or a meaningful change in fetal movement requires prompt professional medical assessment.