Preterm-Labor

Defined as labor that starts before 37 completed weeks of pregnancy.
Labor involves regular contractions of the uterus and thinning and opening of the cervix, allowing the fetus to enter the birth canal.
Earlier delivery increases health risks for the baby, leading to the need for special care, often in a neonatal intensive care unit (NICU).
Premature infants, or "preemies," may experience long-term mental and physical health concerns.

Preterm labor is a syndrome with multiple causes leading to a common outcome of painful contractions and cervical dilation.
Decidual hemorrhage and placental abruption: Significant bleeding during pregnancy can lead to preterm labor, contributing to at least 20% of spontaneous preterm births.
Uterine overdistension: Conditions like multiple gestations or polyhydramnios raise the risk of contractions and preterm delivery due to the increased size of the uterus.
Cervical insufficiency: This is characterized by early painless dilation of the cervix due to trauma or cervical surgery, resulting in a high risk of preterm birth.
Uterine distortion: Anomalies in uterine shape can prompt premature contractions and delivery, especially in cases of uterine fibroids.
Maternal inflammation/stress: Stress can lead to immune alteration and inflammation, raising risks for psychiatric and neurological issues in offspring.

Uteroplacental insufficiency: Conditions like early-onset preeclampsia or fetal growth restriction can overlap with preterm labor risks.
Intrauterine infection: This is a notable cause of spontaneous preterm labor, associated with 25-40% of cases, often going unnoticed until amniotic fluid analysis occurs.

History of Preterm Birth: Women with previous preterm deliveries or labor have higher recurrence risks.
Multiple Gestations: Pregnancies with twins or more drastically elevate preterm risks, often linked to assisted reproductive technology.
Reproductive organ anomalies: Such as having a short cervix increases the risk in pregnancy.

Ethnicity: Certain groups have higher incidences of preterm birth.
Maternal Age: Women under 18 and over 35 have higher chances of preterm birth due to associated health conditions.
Lifestyle and Environment: Factors include inadequate prenatal care, smoking, substance abuse, domestic violence, lack of support, high stress levels, and prolonged working hours.

History taking: Includes past medical history, previous complications, and noted symptoms.
Physical Examination: Pelvic exams to assess cervical dilation and any discharge, alongside abdominal exams for tenderness and fetal position.
Tests:
- Ultrasound for gestational age and fetal condition.
- Transvaginal ultrasound for cervical length measurement.
- Vaginal swab for fetal fibronectin testing.
- Urine tests for infections.
- Fetal heart rate monitoring to evaluate contractions.

Preconception Care: Maintain a healthy weight, follow a nutritious diet, manage health conditions, and practice good hygiene.
Antepartum Treatment: Educate on signs and modify lifestyle (e.g. smoking cessation, diet).
- Bed rest, hydration, and avoiding intercourse may be options, though uncertain in effectiveness.
Medications: Tocolytic therapy can be considered based on individual patient condition and gestational age.
- Common tocolytics include calcium channel blockers, β2-adrenergic agonists, and magnesium sulfate, among others.
- Side effects vary for mother and fetus (e.g., headache, respiratory issues).
Acceleration of Fetal Lung Maturity: Administering corticosteroids to enhance surfactant production and reduce respiratory distress risks in preterm infants.

Short-term Complications: Include breathing difficulties, heart problems, temperature control issues, and risk of infections.
Long-term Complications: Neurodevelopmental impairments, chronic disabilities, and psychological issues can arise in premature infants.

Monitor for vaginal bleeding, frequent contractions, menstrual-like cramps, pelvic pressure, changes in vaginal discharge, and abnormal fetal movement patterns.