Preterm Labour in India: Signs, Tocolytics, Steroids & Care

• Preterm labour is regular contractions (4 or more in 20 minutes) with cervical change before 37 weeks. Seek hospital care immediately — earlier treatment works better.
• Antenatal corticosteroids (betamethasone or dexamethasone) are the single most important intervention, cutting respiratory distress, brain bleeds and newborn death. They are free under JSSK.
• Tocolytics like atosiban and nifedipine do not stop preterm birth long-term — they buy 48 hours to let steroids work and to transfer to a hospital with a NICU.
• Magnesium sulfate before 32 weeks reduces cerebral palsy in survivors by about 30 percent and is freely available at Indian government facilities.
• Warning signs include regular contractions, vaginal bleeding, leaking fluid, pelvic pressure, low backache and bloody mucus discharge. Call 102 or 108 (free ambulances) and go to a hospital with a labour ward.
• After a previous preterm birth, vaginal progesterone, cervical length scans and cerclage (when indicated) help most women reach term next time.

Preterm labour is the onset of regular uterine contractions — usually 4 or more in 20 minutes, or 8 or more in 60 minutes — together with cervical change (dilatation of 2 cm or more, effacement of 80 percent or more, or progressive change on repeat examination) before 37 completed weeks. Preterm birth is simply delivery before 37 weeks.

Doctors group preterm birth by how early it happens, because the risks differ sharply:

Knowing the category matters because it drives almost every decision — which hospital, which NICU level, and which treatments are worth giving.

Several factors raise the risk of going into labour early. The single strongest is a previous spontaneous preterm birth (recurrence runs 30–50 percent, higher after two or more). Other important ones include a twin or higher-order pregnancy, a short cervix on scan, previous cervical surgery, polyhydramnios, infections (urinary, vaginal, dental and systemic), hypertensive disorders such as Preeclampsia in Pregnancy: Diagnosis and Care in India, placental problems including placenta previa and Placental Abruption in India: Signs and Emergency Care, premature rupture of membranes, a short gap between pregnancies, and maternal age under 18 or over 35.

India's high rate reflects a stacking of these factors: widespread maternal undernutrition, anaemia in roughly half of pregnant women, a heavy burden of genitourinary infection, frequent hypertensive disorders, and uneven access to quality antenatal care in rural areas. The rising number of IVF pregnancies — often with more than one embryo transferred — adds twin pregnancies that very often deliver early. In absolute numbers, India records around 3.5 million preterm births a year, the most of any country.

The reassuring part is that much of this is preventable or treatable. Improving nutrition and treating anaemia, managing chronic conditions before pregnancy, treating infections early, identifying high-risk women for progesterone or cerclage, spacing pregnancies 18–24 months apart, and favouring single embryo transfer in IVF all lower risk. And when preterm labour does start, steroids, tocolytics and magnesium sulfate are increasingly available even at district level under JSSK.

Spotting preterm labour early genuinely changes outcomes, because earlier treatment is more effective at delaying delivery and buying time for steroids. Every woman in the second half of pregnancy should know the warning signs and have a low threshold for getting checked.

The classic sign is regular contractions — a tightening of the abdomen that comes and goes, lasts 30–60 seconds, and grows stronger and more frequent over time (often every 5–10 minutes or closer). It may feel like period cramps, a low backache, downward pelvic pressure, or a tightening band across the belly. Telling these apart from harmless practice contractions can be hard; our guide to Braxton Hicks versus real contractions explains the difference. When in doubt, get assessed.

Other warning signs to take seriously:

Some leaking can be confused with urine or normal discharge. If you are unsure, a hospital can confirm ruptured membranes with a sterile speculum test.

Go to the nearest hospital with a labour ward immediately for: regular contractions every 10 minutes or sooner before 37 weeks; any vaginal bleeding; any suspected leaking of fluid; persistent pelvic pressure, backache or cramping; reduced fetal movements (fewer than 10 in 2 hours at your usual active time); severe abdominal pain or a hard, tender belly; or severe headache, visual disturbance, upper-abdominal pain or sudden swelling (possible preeclampsia). Call 102 (Janani Express maternal ambulance) or 108 (general emergency ambulance) — both free for pregnant women across India under JSSK.

While waiting for transport, lie on your left side (this improves placental blood flow), avoid heavy eating or drinking in case surgery is needed, and bring your MCP card (Mother and Child Protection card with antenatal records), Aadhaar and current medicines. Note the time symptoms started, how often contractions come, and the colour and amount of any leaking or bleeding — this helps the team.

One honest reassurance: some women have contractions that settle on their own without progressing. Getting checked for something that turns out to be benign is completely fine — far better than missing true preterm labour. JSSK makes assessment free at government facilities, so cost should never be the reason you hesitate.

On arrival, the team works through a structured assessment to answer three questions: is labour actually established, are the membranes intact, and how is the baby? This usually includes vital signs and a general check (temperature for infection, BP and pulse for preeclampsia or sepsis), a detailed history, and an abdominal examination assessing the size of the uterus, its tone and tenderness, the baby's position, and the fetal heart rate by Doppler.

A sterile speculum examination looks for pooling of amniotic fluid (suggesting ruptured membranes), any bleeding, and visible cervical change — avoiding a digital examination if the waters are thought to have broken, to reduce infection risk. If membranes are intact, a digital cervical examination assesses dilatation and effacement. Dilatation of 2 cm or more, effacement of 80 percent or more, or clear change over 1–2 hours confirms established preterm labour.

Ultrasound checks the baby's position, heart rate and wellbeing, confirms the placenta's location, and measures cervical length (under 25 mm signals higher risk). Cardiotocography (CTG) records contractions and the fetal heart rate continuously for 30–60 minutes. Blood and urine tests look for infection and anaemia, a high vaginal swab screens for bacterial vaginosis and other infections, a low vaginal/rectal swab checks for Group B Streptococcus, and a urine test screens for the urinary tract infections that so often trigger early labour.

In borderline cases, predictive tests can help. Fetal fibronectin (a swab of vaginal secretions between 22–34 weeks) is most useful when negative — it strongly reassures that birth is unlikely in the next 1–2 weeks; a positive result suggests higher risk. It costs roughly Rs 3,000–6,000 at major private centres and is not widely available. Actim Partus (phIGFBP-1) is a similar test costing around Rs 2,000–4,000.

Putting it together, the team reaches one of four conclusions: established preterm labour (start treatment); threatened preterm labour with contractions but no cervical change (observe and monitor); premature rupture of membranes (a specific pathway with antibiotics and steroids); or a false alarm such as Braxton Hicks (reassurance, a few hours of observation, then home with clear safety-netting advice).

Tocolytics are medicines that calm uterine contractions to delay delivery, typically for up to 48 hours. They do not prevent preterm birth in the long run — most studies show a delay of only 48 hours to 7 days — but that window is precious: it lets antenatal steroids take full effect and allows transfer to a hospital with the right level of NICU. They are generally not used beyond 34 weeks, and never when there is chorioamnionitis, abruption, fetal distress, severe preeclampsia or significant maternal compromise.

Nifedipine (Adalat, Calcigard) is the workhorse in Indian practice because it is cheap, taken by mouth, effective and reasonably safe. A calcium channel blocker, it is usually given as 20 mg orally, repeated every 30 minutes if needed up to 3 doses, then 10–20 mg every 4–6 hours (maximum 160 mg/day). A course costs only about Rs 30–200. Side effects include a drop in blood pressure, fast heart rate, headache, flushing and ankle swelling. It is used at most district hospitals and CHCs under JSSK.

Atosiban (Tractocile) is often preferred at well-resourced tertiary centres for its clean safety profile. An oxytocin-receptor antagonist that acts mainly on the uterus, it causes very few maternal side effects, which makes it valuable for women with heart or breathing conditions. It is given as a 6.75 mg IV bolus, then 18 mg/hour for 3 hours, then 6 mg/hour for up to 45 hours (48 hours total). The catch is cost — Rs 3,000–8,000 per dose privately, so a full course can reach Rs 30,000–80,000. It is free at major government medical colleges under JSSK and partly covered under PMJAY.

Other options have narrower roles. Indomethacin, an NSAID, is an effective short-term tocolytic but is limited to under 48 hours and before 32 weeks because longer use can affect the baby's heart (ductus arteriosus) and amniotic fluid. Older beta-agonists such as terbutaline and ritodrine are being phased out because of significant maternal cardiac side effects — the US FDA issued a black-box warning against prolonged terbutaline use in 2011. Magnesium sulfate, although vital for neuroprotection, is no longer recommended as a primary tocolytic because it does not work well for that purpose.

Steroids given to the mother before a preterm birth are the most powerful tool we have to improve a preterm baby's outcome. They cross the placenta and speed up lung maturation by boosting surfactant, while also helping the brain and gut. The evidence is overwhelming: antenatal steroids cut respiratory distress syndrome by roughly 30–50 percent, brain (intraventricular) haemorrhage by about 40 percent, necrotising enterocolitis by about 50 percent, and newborn death by about 30 percent — with no offsetting harm. Our dedicated guide to antenatal corticosteroids for preterm birth goes deeper.

They are recommended for any woman likely to deliver within 7 days between 24 and 34 weeks. The 24-week floor reflects the limit of viability; some centres offer steroids at 22–23 weeks case by case when active intensive care is planned. At the upper end, benefit tapers off as lungs mature, though some guidelines now offer a course up to 36 weeks and 6 days when an early delivery is planned (the ALPS trial, 2016).

Two regimens are equally acceptable:

A few practical points. Even a single dose helps, so an incomplete course is still worth giving in a rush. Maximum benefit is at 24–48 hours after the first dose, which is why tocolytics are used to buy that time. A single 'rescue' course can be repeated if more than 7 days have passed and preterm birth still threatens before 34 weeks — but repeated multiple courses are avoided. Side effects are minor: a temporary rise in blood sugar (so women with diabetes may need short-term insulin adjustment) and brief, normal changes in fetal heart-rate variability.

Under JSSK, steroids are stocked free at every government facility from PHC level upwards. Even a single dose given at a PHC or CHC before transfer to a larger hospital provides real benefit. Few interventions in all of obstetrics are this cheap, this safe and this effective — every preterm delivery between 24 and 34 weeks should receive them.

Beyond its role in eclampsia, magnesium sulfate is now established as a brain-protecting medicine for babies expected to be born before 32 weeks. Randomised trials and meta-analyses show it reduces cerebral palsy in surviving children by about 30 percent at these gestations — the number needed to treat is around 50 to prevent one case. It is thought to stabilise nerve-cell membranes, dampen excitotoxic injury, improve cerebral blood flow and reduce inflammation in the developing brain. The benefit is greatest at 24–30 weeks and is unproven beyond 32 weeks.

It is given when preterm delivery looks imminent (within about 24 hours, sometimes 48) before 32 weeks — whether that is spontaneous labour, or a medically planned delivery for severe preeclampsia, severe IUGR, abruption or severe rupture of membranes. The neuroprotection regimen is a 4–6 gram IV loading dose over 20–30 minutes, then 1–2 grams/hour by infusion for up to 24 hours. (This is IV-led, unlike the IM-and-IV Pritchard regimen used for Eclampsia in India: Seizures, Magnesium Sulfate and the 102 Pathway.)

Monitoring keeps it safe: knee reflexes (lost with toxicity), breathing rate (kept above 12/minute), urine output (above 30 ml/hour, since magnesium is cleared by the kidneys), and serum levels in some settings. The antidote — IV calcium gluconate 10 percent — is kept on the resuscitation trolley wherever magnesium is given. With trained staff following the protocol, clinically significant toxicity is very rare, and millions of doses are given safely in India each year.

A few practical notes. Magnesium is given in addition to steroids and tocolytics — each does a different job. It is stopped once the baby is born (continued afterwards only for eclampsia or severe preeclampsia, where it prevents seizures). It is freely available at every Indian facility from PHC level upwards under JSSK (about Rs 50–200 per vial). Because both nifedipine and magnesium can lower blood pressure, the combination needs careful BP monitoring or an alternative tocolytic. Warmth, flushing, nausea and a metallic taste during the loading dose are common and are not signs of toxicity. Whenever delivery before 32 weeks looks likely, every effort should be made to give it.

Antibiotics have two specific roles in preterm labour. The first is for preterm premature rupture of membranes (PPROM), where they prolong the time before birth and reduce newborn infection. Following the ORACLE I trial and later guidelines, the standard is IV ampicillin 2 g every 6 hours for 48 hours, then oral amoxicillin 250 mg three times daily for 5 days, combined with erythromycin for 7 days. This reduces membrane infection (chorioamnionitis), buys 5–7 extra days on average, and lowers neonatal infection. Co-amoxiclav (Augmentin) is avoided because it is linked to more necrotising enterocolitis. The course costs about Rs 200–1,000 privately, or is free under JSSK.

The second role is Group B Streptococcus (GBS) prophylaxis in labour. GBS lives harmlessly in the vagina and rectum of 15–25 percent of pregnant Indian women, but can pass to the baby during birth and cause serious early infection (sepsis, pneumonia, meningitis) in 1–2 per 1,000 births. The prevention is IV antibiotics during labour — penicillin G or ampicillin, or cefazolin/clindamycin for women with penicillin allergy.

Because India does not yet have universal GBS screening, prophylaxis is usually risk-based: given when the baby is preterm, when membranes have been ruptured for more than 18 hours, when there is fever in labour, when there is GBS in the urine, when screening is positive, or when a previous baby had GBS disease. Penicillin and ampicillin are cheap and freely available under JSSK.

Other infections matter too, because infection is one of the biggest drivers of preterm birth in India. Active urinary tract infections are treated by culture and sensitivity — sometimes this alone settles the contractions. Bacterial vaginosis, candidiasis and any sexually transmitted infections are treated, as are TB, malaria and other systemic infections per their own protocols. Suspected chorioamnionitis (fever, fast maternal and fetal heart rates, a tender uterus, foul discharge) is treated with broad-spectrum antibiotics and prompt delivery whatever the gestation, because continuing the pregnancy with infection is more dangerous than delivering.

When preterm labour progresses despite tocolytics, or there is a reason to deliver (infection, severe maternal or fetal compromise, or simply reaching 34+ weeks where tocolytics stop), birth goes ahead. Where it happens is critical, because a preterm baby needs NICU care ready at the moment of birth, and the level required rises as gestation falls — late preterm babies often manage with limited support at a district hospital, while very and extremely preterm babies need a level III NICU at a medical college or major tertiary hospital.

If the current hospital cannot provide the right NICU level, transfer before delivery (in-utero transfer) gives much better outcomes than moving an unstable newborn afterwards. The 102 Janani Express ambulance is free for inter-facility transfer of women in labour. Sometimes birth is too imminent to transfer, in which case the local team delivers, resuscitates and then arranges postnatal transfer.

Most preterm births are vaginal unless there is a specific reason for caesarean. Vaginal birth is often preferred because a preterm caesarean may need a vertical (classical) uterine cut — the lower segment is not yet well formed — which commits future pregnancies to repeat caesareans and carries a rupture risk. Vaginal birth also avoids the surgical morbidity of caesarean. Caesarean is reserved for malpresentation at very early gestations, fetal distress, placenta previa, abruption with compromise, severe preeclampsia with maternal instability, failed progress, and similar obstetric indications.

During a preterm vaginal birth the team monitors the fetal heart continuously, avoids breaking intact membranes unnecessarily, uses oxytocin cautiously (preterm uteri respond strongly), and offers good pain relief (epidural is safe). Delayed cord clamping — waiting 30–60 seconds before clamping — gives the baby a better blood volume, less anaemia and fewer brain bleeds. The baby is handed straight to the neonatal team for stabilisation. It helps enormously to prepare the mother for what to expect: the baby will likely be small, may need immediate breathing support, will go to the NICU soon after birth, and may not be able to be held straight away. The cord blood and placenta are usually sent for tests.

NICU care has improved dramatically, and survival and long-term outcomes are far better than even 10–20 years ago. India's NICU landscape ranges from comprehensive level III units at AIIMS, government medical colleges and major private chains (Cloudnine, Apollo Cradle, Manipal, Fortis, Rainbow) to level II units at many district hospitals that handle late and moderate preterm babies well.

Survival in modern Indian NICUs, with regional variation, runs broadly as follows:

Inside the NICU, the main supports are breathing help (surfactant for respiratory distress; CPAP, preferred over a ventilator where possible; mechanical ventilation for severe cases), temperature control in an incubator or warmer, and nutrition — starting with IV feeds for the smallest babies and moving to tiny volumes of the mother's expressed milk, which is strongly preferred because colostrum and breast milk reduce necrotising enterocolitis and sepsis. Surfactant costs Rs 25,000–50,000 a dose privately but is free at major government NICUs under JSSK.

The team also prevents and treats infection, manages jaundice with phototherapy, and watches for complications such as brain haemorrhage, retinopathy of prematurity (screened and laser-treated if severe), patent ductus arteriosus and chronic lung disease. Developmental care matters too: kangaroo mother care — skin-to-skin contact — is started as soon as the baby is stable, alongside gentle handling and a calm, dim environment.

Length of stay scales with gestation: a few days to 10 for late preterm, 2–4 weeks for moderate, 6–12 weeks for very preterm, and 12–20+ weeks for extremely preterm. A baby usually goes home when feeding well, holding its temperature in an open cot, weighing around 1.8–2 kg, and free of significant ongoing problems.

On cost: private NICU care runs Rs 15,000–50,000 per day, so a long stay can reach several lakh to tens of lakh. It is free with no upper limit at government NICUs under JSSK, and partly covered (up to Rs 5 lakh per family per year) at PMJAY-empanelled hospitals. Structured follow-up — paediatric reviews, developmental checks, hearing and eye screening, and early-intervention therapy if needed — helps the great majority of preterm babies grow into healthy children.

After one spontaneous preterm birth, the recurrence risk is about 30–50 percent (50–70 percent after two or more) — but several evidence-based steps lower it substantially. Vaginal micronised progesterone, 200 mg daily from 16–20 weeks until 36 weeks, reduces preterm birth before 33 weeks by about 30 percent in women with a previous preterm birth or a short cervix (under 25 mm) on mid-pregnancy scan; it costs around Rs 500–1,500 a month. The older intramuscular 17-OHPC (Susten 17-P) has fallen out of favour after the PROLONG trial (2020) questioned its benefit and the US FDA recommended withdrawal in 2023, though FOGSI still considers it acceptable in some cases.

Cervical cerclage — a stitch placed around the cervix to support it — is the other major tool, with its own clear indications:

Our detailed guide to cervical cerclage indications in India covers the McDonald and Shirodkar techniques, costs (Rs 20,000–50,000 privately, free under JSSK) and risks. Cerclage is not done with active labour, ruptured membranes, infection or fetal demise, and the stitch is removed at 36–37 weeks or earlier if labour starts.

Around all of this sit broader measures: cervical length screening at 18–24 weeks for higher-risk women; low-dose aspirin from 12–16 weeks for those at raised preeclampsia risk; treating UTIs, vaginal infections and gum disease; correcting anaemia and optimising preconception nutrition; stopping smoking and alcohol; spacing pregnancies at least 18–24 months apart; and single embryo transfer in IVF to avoid twins.

In the next pregnancy, the plan is to book early at a high-risk centre, document the history clearly, start vaginal progesterone at 16–20 weeks, screen cervical length at 18–24 weeks (sometimes more often), place a cerclage if indicated, monitor closely for other complications, teach the warning signs of preterm labour, and give steroids promptly if early birth threatens. With this structured approach, about 60–70 percent of women with a previous preterm birth reach term or near-term next time. A previous preterm birth raises the risk — it does not decide the outcome.

• WHO recommendations on interventions to improve preterm birth outcomes
• WHO: Preterm birth fact sheet
• ACOG Practice Bulletin: Management of Preterm Labor
• ACOG Committee Opinion: Antenatal Corticosteroid Therapy for Fetal Maturation
• NICE Guideline NG25: Preterm labour and birth
• Crowther CA et al. Magnesium sulphate for women at risk of preterm birth for neuroprotection of the fetus (Cochrane Review)
• Ministry of Health & Family Welfare, India: Janani Shishu Suraksha Karyakram (JSSK)
• FOGSI Good Clinical Practice Recommendations on Preterm Labour