Preterm labor is the onset of regular uterine contractions with cervical change before 37 completed weeks of pregnancy, and preterm birth is the delivery that follows. India has the world's highest absolute count of preterm births, with a national rate of roughly 13 to 15 percent — about one in seven to eight Indian pregnancies ends preterm, contributing around 3.5 million preterm babies every year. The reasons are overlapping: maternal undernutrition and anaemia, infections (UTI, bacterial vaginosis), teenage and late-age pregnancy, IVF-driven multiple gestation, and uncontrolled pregnancy hypertension and diabetes.

Preterm birth has four categories that drive both urgency and resources. Late preterm (34 to 36+6 weeks) accounts for roughly 70 percent of cases, with survival above 95 percent and usually brief NICU support. Moderate preterm (32 to 33+6) has over 90 percent survival with a few weeks of NICU. Very preterm (28 to 31+6) has 70 to 85 percent survival in good Level 3 NICUs. Extreme preterm (under 28 weeks) survival ranges from 30 to 60 percent depending on gestational age and NICU quality, with higher long-term complication risk.

Recognisable risk factors substantially increase preterm labor chance, and identifying them early allows targeted prevention. The strongest predictor is a previous preterm birth — a 30 to 50 percent recurrence rate that needs progesterone supplementation from 16 weeks. A short cervix (under 25 millimetres) on the 20-week anomaly scan is another strong predictor and an indication for vaginal progesterone or cervical cerclage. Multiple gestation from IVF and ovulation induction carries a 50 to 60 percent preterm rate for twins and higher for triplets.

Infections are a major and partly preventable driver. Asymptomatic bacteriuria (5 to 10 percent of Indian pregnancies, screened at every visit), bacterial vaginosis, and periodontal disease all raise preterm risk and are treatable. Chronic hypertension, diabetes, thyroid disorders, asthma, lupus and kidney disease need active management. Maternal age extremes (under 18 and over 35), low BMI, anaemia, tobacco and gutka use, and short interpregnancy interval (under 18 months) all add to risk.

Warning signs of preterm labor are recognisable but often mistaken for normal pregnancy discomfort. Regular uterine contractions are the most important sign — contractions every 10 minutes or more frequently, lasting 30 seconds or more, continuing for an hour despite rest and hydration, are not normal Braxton-Hicks and need immediate hospital evaluation. A constant low backache that comes in waves or stays steady through the day can be the only sign in some women.

Other signs include pelvic pressure (heavy downward feeling as if the baby is pushing down), mucus plug passage (thick jelly-like discharge sometimes blood-tinged), watery discharge or sudden fluid gush (suggesting PROM), any vaginal bleeding, and persistent cramps like strong menstrual cramps. Decreased fetal movement also warrants same-day review. The common pattern in Indian practice is dismissing these as routine discomfort or waiting for the next OB appointment, and this delay is the single most avoidable factor in poor outcomes.

If you experience any warning sign before 37 weeks, go to the hospital labor room the same day — not the next antenatal visit, not the morning clinic. The reason is the golden 48-hour window. If preterm labor is confirmed, antenatal corticosteroids (betamethasone or dexamethasone) mature the baby's lungs within 24 to 48 hours and dramatically reduce respiratory distress, intraventricular haemorrhage and death. Tocolytic medication can delay delivery by 48 hours to allow steroids to work and to allow transfer to a NICU-capable hospital. Magnesium sulfate before 32 weeks reduces cerebral palsy risk.

The 108 ambulance service is free and available across most of India for obstetric emergencies, and eSanjeevani teleconsultation can connect you to an OB while you travel. If unsure whether a sign is serious, call your OB or labor room — they will advise you to come in for evaluation. Bring your ABHA number, antenatal records and current medications. The cost of waiting is far higher than the cost of an unnecessary hospital visit.

Hospital assessment follows a standard sequence to confirm labor and guide treatment. The OB's cervical examination checks effacement (cervical thinning, percentage) and dilation (cervical opening, centimetres) — a cervix more than 2 to 3 centimetres dilated or substantially effaced confirms active preterm labor. Cardiotocography (CTG) records fetal heart rate and uterine contractions over 20 to 40 minutes and shows contraction frequency, strength and the baby's response.

Transvaginal ultrasound cervical length is a key test — a cervix shorter than 20 to 25 millimetres with symptoms strongly suggests preterm labor, and the test costs around 600 to 1500 rupees in private centres, free at most government facilities. Fetal fibronectin testing (vaginal swab) is highly negative-predictive — a negative test means delivery in 7 to 14 days is very unlikely — and costs 1500 to 4000 rupees at larger private hospitals. Urine and vaginal cultures look for treatable infections; blood tests check infection markers.

Once preterm labor is confirmed, the strategy is to delay delivery for at least 48 hours so antenatal corticosteroids can act on the baby's lungs, and to transfer to a NICU-capable hospital. Nifedipine (a calcium channel blocker, 50 to 150 rupees) is the first-line tocolytic in most Indian protocols, given orally. Indomethacin is sometimes used before 32 weeks. Atosiban is an effective but expensive alternative in some private hospitals. The goal is the 48-hour steroid window, not indefinite delay.

Antenatal corticosteroids are the single most important intervention. Betamethasone (Betnesol, 100 to 300 rupees per dose) is given as two intramuscular doses 24 hours apart, or dexamethasone (50 to 150 rupees) as four doses 12 hours apart. Steroids between 24 and 34 weeks reduce neonatal respiratory distress, intraventricular haemorrhage, necrotising enterocolitis and death by 30 to 50 percent. Magnesium sulfate as IV infusion before 32 weeks provides neuroprotection and reduces cerebral palsy risk. All three together are the modern standard of care.

Where you deliver matters enormously because not every hospital has a NICU equipped for very or extreme preterm babies. Level 3 NICUs (with ventilators, surfactant, 24-hour neonatology) are essential below 32 weeks. In the government sector, AIIMS branches, state medical college hospitals, and district hospitals under LaQshya and SNCU programmes provide free or subsidised NICU care across India. The National Neonatology Forum (NNF) accredits NICUs.

Private NICU costs typically range from 10,000 to 50,000 rupees per day, and long stays for very preterm babies can run into several lakhs. Insurance covers most NICU care for babies of insured mothers (check newborn coverage). If at risk of preterm delivery, discuss the right hospital with your OB and transfer before delivery if your facility lacks adequate NICU — in utero transfer is safer than transfer after birth. The 108 ambulance service provides free emergency transport. Survival improves substantially with each week beyond 28 weeks.

Several interventions have strong evidence for preventing preterm birth in higher-risk women. Vaginal progesterone (Cygest, Crinone, Susten, 400 to 1500 rupees per month) given from 16 to 36 weeks reduces preterm birth by 30 to 40 percent in women with previous preterm birth or short cervix on ultrasound. Oral progesterone (dydrogesterone) is also used in some Indian protocols. The decision is made by the OB based on history and the 20-week scan cervical length.

Cervical cerclage (a stitch placed around the cervix) is recommended for cervical insufficiency — typically diagnosed by painless second-trimester losses or very short cervix in current pregnancy. The procedure is done under spinal anaesthesia at 12 to 14 weeks and removed at 36 to 37 weeks. Treating infections is evidence-based prevention — asymptomatic bacteriuria, UTI, bacterial vaginosis and periodontal disease are all addressed. Avoiding tobacco (including gutka and beedi), treating chronic conditions, and spacing pregnancies by 18 months reduce risk.

For higher-risk women, several lifestyle adjustments support prevention without complete bed rest (no longer recommended; carries blood clot and deconditioning risks). Adequate hydration matters — 2.5 to 3 litres of water daily, more in summer — because dehydration can trigger contractions. Treat any urinary symptoms (burning, frequency, urgency) within 24 hours because UTI is one of the most common preventable triggers. Maintain good periodontal hygiene with twice-daily brushing, flossing and a dental check in pregnancy.

Avoid heavy lifting (over 10 to 15 kilograms), prolonged standing (over 4 hours without breaks), and vibration-heavy environments. Get 7 to 8 hours of sleep with a midday rest if possible, but stay active with daily walking and prenatal yoga unless the OB advises otherwise. Stop tobacco completely (gutka, paan masala, beedi) and avoid alcohol. Attend every antenatal visit and report new symptoms early. Share warning signs with family members so they can recognise them and help you act quickly.

Outcomes have improved substantially over the past two decades with NICU care, surfactant availability and trained neonatology, and gestational age remains the strongest predictor. At 34 weeks and above, survival is over 95 percent and most babies grow up entirely normally — late preterm babies are essentially small term babies. At 32 to 34 weeks, survival is 90 to 95 percent with NICU support for two to four weeks and largely normal long-term outcomes.

At 28 to 32 weeks, survival is 70 to 85 percent in good Level 3 NICUs, with several weeks of intensive care including ventilator or CPAP support, surfactant, careful feeding, and monitoring for infection. Below 28 weeks (extreme preterm), survival ranges from 30 to 60 percent — 30 percent at 24 weeks, rising to 60 percent by 27 weeks. Outcomes include higher risks of cerebral palsy, developmental delay, retinopathy of prematurity, chronic lung disease and hearing loss, needing long-term developmental follow-up. AIIMS, CMC Vellore and SAARC-linked institutions report outcomes comparable to international benchmarks.