Preterm Labor Before Week 37: Signs and Hospital Care

Introduction to Preterm Labor

Preterm labor is clinically defined as regular uterine contractions resulting in cervical changes (such as dilation or effacement) before completing 37 weeks of pregnancy. In the Saudi healthcare context, medical teams prioritize early detection and management of preterm labor to prolong pregnancy whenever safe, allowing the fetus's vital organs—especially the lungs and brain—to mature fully.

It is crucial for expectant mothers to understand the subtle differences between normal, transient contractions and warning signs that require immediate evaluation at an emergency department under the supervision of a specialized obstetric care team.

Symptoms of Preterm Labor: How to Recognize Them

Preterm labor symptoms can be subtle at first, leading some women to overlook them. The most common clinical signs include:

• Regular Uterine Contractions: A tightening sensation in the abdomen that occurs regularly (e.g., more than 4 times an hour) and does not subside with rest or hydration.
• Persistent Low Backache: A dull, aching back pain that may radiate to the sides and does not change with body position.
• Pelvic Pressure: A feeling that the baby is pushing down, or intense pressure in the pelvic and groin area.
• Menstrual-like Cramps: Abdominal cramping that may be accompanied by mild gastrointestinal upset or diarrhea.
• Changes in Vaginal Discharge: An increase in the amount of discharge, or a shift to watery, mucus-like, or blood-tinged discharge (bloody show).
• Fluid Leaking (PPROM): A sudden gush or continuous trickle of clear, watery fluid from the vagina, indicating premature rupture of membranes.

Distinguishing True Preterm Labor from False Labor

Many pregnant women experience transient contractions known as Braxton Hicks or "false labor." The following table highlights the key clinical differences to help you distinguish between them:

What Happens When You Arrive at the Hospital?

When presenting to the hospital with suspected preterm labor, the medical team will perform a comprehensive evaluation to ensure maternal and fetal safety. These steps include:

1. Clinical Assessment and Monitoring

Two monitoring belts are placed on your abdomen: one to monitor the fetal heart rate and assess fetal well-being, and the other to measure the frequency and strength of uterine contractions. This helps determine if the contractions are active and progressive.

2. Careful Vaginal Examination

The physician will perform a sterile vaginal exam to assess the cervix for dilation and effacement. This exam is performed with extreme caution or avoided if premature rupture of membranes is suspected, to minimize the risk of infection.

3. Diagnostic and Imaging Tests

An ultrasound may be performed to measure cervical length, as a shortened cervix indicates a higher risk of preterm delivery. Additionally, a vaginal swab may be collected to test for fetal fibronectin (fFN), a protein that helps predict the likelihood of delivery within the next two weeks.

Medical Interventions and Treatment Options

Clinical decisions depend on several factors, primarily the exact gestational age (whether in the 7th or 8th month) and maternal-fetal health status. Medical interventions aim to delay delivery or prepare the fetus for birth to minimize complications:

• Tocolytics: Medications administered to temporarily slow down or stop uterine contractions, usually for 24 to 48 hours, to allow other critical medications to take effect.
• Corticosteroids: Injections given to the mother to accelerate fetal lung maturity and reduce the risk of respiratory distress syndrome after birth.
• Magnesium Sulfate: Administered intravenously in cases of imminent preterm labor (especially before 32 weeks) for fetal neuroprotection to reduce the risk of cerebral palsy.
• Antibiotics: Prescribed in cases of active infections or premature rupture of membranes to protect both mother and baby from bacterial infections.

In some clinical scenarios, the medical team may determine that continuing the pregnancy poses a risk to the mother or baby (such as severe preeclampsia or placental abruption). In these cases, delivery is the safest option, whether through planned vaginal delivery or cesarean section based on direct clinical assessment.

Risk Factors and Potential Complications

While preterm labor can occur without clear causes, certain factors increase its likelihood, such as carrying multiples, a history of preterm birth, uterine abnormalities, or severe stress. Complications of preterm birth may require the infant to stay in the Neonatal Intensive Care Unit (NICU) to support breathing and feeding until development is complete.

When to Seek Emergency Care Immediately

Remember, prompt medical intervention saves lives. Do not wait; go to the nearest emergency department immediately if you experience any of the following warning signs:

• Bright red vaginal bleeding similar to or heavier than a menstrual period.
• A sudden gush or continuous leaking of fluid from the vagina.
• A noticeable or sudden decrease in fetal movement.
• Painful, regular contractions occurring every 10 minutes or less that do not subside with rest.
• Severe, continuous abdominal pain.