38 Weeks Pregnant

38 Weeks Pregnant: Waiting for Labor and Watching the Signs

At 38 weeks pregnant, birth may feel very close. You may feel heavier, have pelvic pressure, sleep difficulty, mild swelling in the feet, and irregular contractions. Many of these changes are common near the end of pregnancy, but some signs need prompt assessment.

At this stage, the focus is knowing your baby's movement pattern, telling true labor from Braxton Hicks, knowing when to call your clinician or go to the hospital, and reviewing your birth and postpartum plan.

This content is educational only and does not provide a diagnosis or treatment plan. If you have bleeding, leaking fluid, clear reduced fetal movement, painful regular contractions, severe headache, vision changes, sudden swelling of the face or hands, upper abdominal pain, chest pain, severe shortness of breath, fever, or concerning symptoms, consult a licensed clinician in Saudi Arabia.

How is week 38 calculated?

Week 38 is counted from the first day of your last menstrual period. This means the medical pregnancy age is thirty-eight weeks, while the actual age after fertilization is roughly two weeks shorter.

If your due date has already been confirmed by ultrasound, continue using the date in your pregnancy file. You can use the pregnancy due date calculator as a helpful estimate.

What body changes may happen at 38 weeks?

• Mild swelling in the feet or ankles, especially later in the day.
• Heaviness and pressure in the pelvis or lower abdomen.
• More frequent urination if the baby's head is lower in the pelvis.
• Back or pelvic pain and difficulty sleeping or moving comfortably.
• Irregular contractions that may be Braxton Hicks.
• Increased discharge or loss of the mucus plug for some women.
• Anticipation, anxiety, or a strong urge to finish birth preparations.

Mild swelling can be common at the end of pregnancy, but sudden or severe swelling, especially with headache, vision changes, or upper abdominal pain, may need blood pressure monitoring during pregnancy or a preeclampsia evaluation.

What is happening with the baby at 38 weeks?

At 38 weeks, most of the baby's body is highly mature. Many organs are functioning well, while the brain and lungs continue maturing after birth and throughout childhood.

• The baby continues gaining weight and fat under the skin.
• Most organs are mature and functioning for this stage.
• The brain and lungs continue gradual development.
• Movement may feel more like stretching, pressure, or rolling than sharp kicks.
• The baby may be head-down, but position is confirmed by your clinician or ultrasound when needed.

How big is the baby at 38 weeks?

At 38 weeks, the baby may be between 43.2 and 50.8 centimeters long and weigh between 2.8 and 3.4 kilograms. These measurements are approximate and vary with genetics, dating accuracy, and growth pattern.

With gestational diabetes, hypertension, multiple pregnancy, measurement concerns, or growth concerns, your clinician may recommend a fetal growth ultrasound or amniotic fluid assessment.

Baby movement at 38 weeks

Movement may feel different because space is tighter. You may notice stretching, pressure, rolling, or shifting rather than strong sharp kicks. The important point is that movement should not clearly decrease.

If you notice a clear reduction or concerning change in movement, do not wait for the next appointment. Ask about fetal movement follow-up. Your clinician may use fetal heart rate monitoring CTG or ultrasound depending on the situation.

Labor signs to know

Labor signs may begin gradually, but not every symptom means active labor has started. It helps to know the difference between late-pregnancy preparation and true labor.

• Regular contractions that become stronger and closer together.
• Lower back pain or pelvic pressure that increases with contractions.
• Water breaking or a concern for leaking fluid.
• Mucus discharge or light bloody show.
• Reduced fetal movement or a concerning movement change.

If you are not sure whether symptoms are true labor, you may need a labor signs evaluation or Braxton Hicks contractions evaluation.

Water breaking and mucus plug

Water breaking may be a clear gush or ongoing leaking. If you think the fluid is coming from the amniotic sac, contact your clinician or hospital according to your instructions because it needs assessment.

Losing the mucus plug can happen hours, days, or longer before labor. It does not always mean labor has started. Heavy bleeding, severe pain, leaking fluid, or reduced movement needs prompt care.

Services such as water breaking evaluation and mucus plug evaluation can help clarify the next step.

Follow-up visit and tests

• Reviewing blood pressure, weight, swelling, and fetal movement.
• Reviewing Group B Strep GBS screening or a GBS swab in pregnancy if already done.
• Reviewing your birth plan and when to go to the hospital.
• Checking fetal position when needed by examination or ultrasound.
• Requesting pregnancy ultrasound or fluid or growth assessment when medically indicated.
• Discussing high-risk pregnancy follow-up with diabetes, hypertension, multiple pregnancy, or growth concerns.

Birth plan and when to call

Ask your clinician or hospital who to call when symptoms begin and when to go directly to emergency or labor and delivery. A clear birth plan consultation can reduce stress when labor starts.

• Who should I call when contractions begin?
• How frequent or long should contractions be before I come in?
• What should I do if my water breaks?
• Which entrance should I use for labor or emergency care?
• Does my GBS result or any other result require a special labor plan?

Pain relief and cesarean birth if needed

It is useful to review labor pain relief options before labor begins, including breathing, movement, support, and medical options available at your hospital.

If there may be a medical reason for cesarean birth, a previous cesarean, or fetal position concern, you may need a cesarean birth discussion if needed. The final decision should focus on your safety and the baby's safety.

Induction and waiting

In some cases, your clinician may discuss a labor induction discussion if needed, such as with certain cases of high blood pressure, diabetes, low fluid, or other medical reasons. Induction decisions should be based on medical assessment rather than preference alone.

Breastfeeding and postpartum planning

This is a good time to review breastfeeding education, what happens in the first hours after birth, and how to ask for help if feeding is difficult.

Also discuss postpartum recovery education and a postpartum family planning consultation, because options may depend on breastfeeding, medical history, and birth type.

Tips for week 38

• Save your clinician and hospital numbers somewhere easy to find.
• Review your hospital bag, ID, documents, and insurance information if applicable.
• Follow your clinician's instructions for fetal movement monitoring.
• Drink water regularly and rest with your feet elevated if swelling is mild.
• Do not use a new medicine, supplement, or herbal product before a medication review during pregnancy.
• Continue pregnancy vitamins as prescribed by your clinician.

When should you see a clinician quickly?

• Vaginal bleeding or leaking fluid.
• Clear reduction or absence of fetal movement.
• Painful regular contractions that become stronger and closer together.
• Sudden or severe swelling of the face, hands, or feet.
• Severe headache, vision changes, upper abdominal pain, or high blood pressure.
• Chest pain, severe shortness of breath, fainting, or severe dizziness.
• High fever or severe pain with urination.

Next step

After week 38, follow-up is very close to birth. You can continue to 39 weeks pregnant or return to the week-by-week pregnancy guide.