Pregnancy Week 31: Baby Size, Symptoms and Care (India Guide)

• Your baby is about 41 cm and 1.5–1.6 kg, gaining roughly 200–250 g a week, with lung surfactant and brain folds developing fast.
• A baby born at 31 weeks has an excellent survival rate (around 95% in good NICUs), but every extra week inside means an easier course — so reaching term is still the goal.
• Blood pressure is now the most important reading at each visit; a severe headache, vision changes or sudden swelling needs an urgent BP check for preeclampsia.
• Keep doing a daily kick count. Reduced fetal movement is a red flag — go in for an NST the same day, do not wait.
• Plan ahead this week: book your GBS swab for 35–37 weeks, start your birth plan, and pack your hospital bag by week 34.

Week 31 sits squarely in the third trimester. Your baby now measures around 41 cm crown-to-heel and weighs about 1.5–1.6 kg — roughly a large coconut or a small pineapple. From here until birth, expect a steady gain of about 200–250 g each week as fat fills out under the skin, smoothing wrinkles and helping the baby control body temperature after birth.

Several things are maturing quickly this week:

Even with all this development, every week inside still matters. Babies born now usually do well, but lungs, feeding and immunity all strengthen significantly in the final weeks — which is why reaching term remains the aim.

In your own body, blood volume is now about 45–50% above pre-pregnancy levels and your heart is working hard. The top of your uterus (fundus) sits roughly 31 cm above the pubic bone, your centre of gravity has shifted well forward, and you may feel breathless on exertion as the growing uterus presses up on the diaphragm. Insulin resistance is pronounced, and blood pressure is watched closely now because preeclampsia risk climbs through the third trimester. Most women are seen every two weeks at this stage, and weekly if the pregnancy is high-risk.

Most week-31 symptoms are carried over from earlier weeks and simply feel more intense as the baby grows. None of the following are unusual on their own — but always flag anything severe or sudden to your doctor.

A few notes worth keeping in mind: Braxton-Hicks contractions are brief, irregular and painless — they are practice tightenings, not labour, unless they become regular and progressive. Colostrum (the first milk) may leak from your breasts now; this is completely normal, and breast pads help. New or worsening piles and haemorrhoids are common from the extra pelvic pressure, and a sitz bath usually brings relief.

Your bump is now prominent to everyone. Fundal height in this window roughly matches your weeks of pregnancy in centimetres (about 31 cm at week 31), and your doctor measures it at each visit to track growth. A difference of more than 2–3 cm from expected may prompt a growth scan to check the baby's size and fluid level — usually nothing more than a precaution.

Comfort becomes a daily project. Loose Indian wear like drawstring kurtas, stretchy-waist leggings, salwar-kurta or palazzos works well, paired with supportive bras (often 2–3 cup sizes larger now) and flat, slip-on footwear since bending and balance are harder. A full-body or wedge pregnancy pillow (roughly Rs 800–4000) makes a real difference to sleep — many women sleep on the left side with a pillow between the knees and one under the bump. Endless comments from relatives and strangers about your size, shape or due date are part of the territory; a polite 'soon, thank you' and a change of subject is a perfectly good answer.

Skin changes often peak now. The linea nigra darkens, melasma patches on the face may be at their most noticeable, and stretch marks (striae) on the bump, thighs, breasts and hips appear pink or red before fading to silvery white over the months after birth. Genetics largely decide who gets them; moisturising with coconut, almond or vitamin E oil keeps skin comfortable even though it cannot reliably prevent marks.

One skin symptom is not cosmetic: intense itching, especially on the palms and soles and worse at night, can signal obstetric cholestasis, a liver condition linked to stillbirth risk if untreated. It needs liver function tests and a bile acid level — read why palms-and-soles itching needs a bile acid test and tell your doctor promptly. A separate, harmless but itchy rash called PUPPP can also appear on the bump in the third trimester and is treated symptomatically.

Sex in the third trimester is safe for most uncomplicated pregnancies (avoid it with placenta previa, threatened preterm labour or ruptured membranes). Libido varies widely — both more and less are normal — and side-lying or other positions that keep weight off the bump are more comfortable. Bleeding or significant pain afterwards warrants a check. In skincare, avoid retinoid products (Retin-A, tretinoin, isotretinoin), use a broad-spectrum SPF 30+ sunscreen daily to limit melasma, and stick to gentle moisturisers.

India's antenatal schedule (per WHO and Ministry of Health and Family Welfare guidance) runs from booking through visits at weeks 14–20, 24, 28, 32 and 34–36, then weekly until delivery — usually 8–12 visits in all. At week 31 you are typically seen every two weeks. Women with high-risk features such as gestational diabetes, high blood pressure, anaemia, twins, a previous preterm birth or a prior caesarean are seen more often; see who counts as high-risk and why.

A routine week-31 visit usually covers your weight; a careful blood pressure reading (the early warning for preeclampsia); a urine dipstick for protein, sugar and infection; fundal height (about 31 cm); the fetal heart rate (120–160 bpm); a review of your kick count and symptoms; and a check on your iron, calcium and vitamin D. It is also when your doctor plans the next steps: the GBS swab at 35–37 weeks, finalising your birth plan over the next couple of visits, and packing your hospital bag.

Group B Streptococcus (GBS) screening is worth understanding now. GBS is a bacterium that 10–30% of women carry harmlessly in the vagina or rectum; if passed to the baby during birth it can rarely cause serious early newborn infection. A vaginal-rectal swab at 35–37 weeks identifies carriers, and a positive result simply means antibiotics through a drip during labour, which sharply cuts the risk. ACOG, RCOG, CDC and FOGSI recommend screening, but in India it is mostly a private-sector test (around Rs 500–1500) and many government facilities use a risk-based approach instead. Our detailed guide on GBS screening in India and how to ask about your status explains how to raise it with your doctor.

This is also the window to firm up delivery logistics: discuss and draft your birth plan, confirm and tour your hospital, plan transport for labour onset (102 Janani Express is free for maternity; 108 is the general emergency line), and choose your paediatrician and postpartum support.

Closer monitoring with a non-stress test (NST/CTG) or biophysical profile (BPP) is usually scheduled from week 36 onward, and earlier for high-risk pregnancies; from week 41 it becomes twice weekly. Our explainer on NST and BPP monitoring in India walks through what each test checks.

If you use government care, all of this is free under JSSK at PHCs, CHCs, district hospitals and medical colleges. PMSMA on the 9th of every month offers a free specialist obstetric review — especially useful for high-risk monitoring — and your Mother and Child Protection (MCP) card tracks everything through pregnancy.

Third-trimester nutrition needs to fuel a fast-growing baby and your own rising demands — but it is not 'eating for two'. You need only about 450 extra kcal a day, and quality matters more than quantity. Because the heavy uterus crowds your stomach, smaller, more frequent meals (3 mains plus 2–3 snacks) usually feel better and ease heartburn.

Protein needs are about 71 g a day (around 1.1 g per kg of pre-pregnancy weight). Vegetarian sources include dal (15–18 g per cooked cup), sprouts, paneer (18–20 g per 100 g), curd, milk, soya chunks (very high), and nuts and seeds; combinations like dal-rice, rajma-chawal, idli-sambar, khichdi and paneer-paratha give complete protein. Non-vegetarians can add fully cooked eggs, chicken and small fish such as sardines and mackerel (great for omega-3) — but avoid large predatory fish like shark, swordfish and king mackerel for their mercury.

Iron stays critical — for the baby's iron stores and your expanded blood volume. With NFHS-5 showing over half of pregnant Indian women are anaemic, most need supplements: routinely 60 mg elemental iron a day, and more if anaemic. Take it with a vitamin C source (lemon or orange) and away from tea, coffee and calcium, which block absorption. See iron-rich Indian foods for pregnancy for what to eat if your haemoglobin is low. Requesting delayed cord clamping (1–3 minutes) in your birth plan gives the baby an extra iron boost at delivery.

Calcium needs are 1000 mg a day — from dairy, ragi (finger millet), til (sesame), almonds and moringa leaves, with supplements (such as Shelcal or Calcimax) if your diet falls short. Vitamin D deficiency is very common in India even in sunny regions, so most women supplement (for example 1000–2000 IU daily, or a weekly/monthly higher-dose sachet as advised).

On dates (khajoor): there is reasonable randomised-trial evidence, mainly from Iran with some Indian replication, that eating 5–6 dates a day from around week 36 onward is linked to a more favourable cervix at admission, shorter labour and less need for induction. It is not magic, and there is minimal downside for women with normal blood sugar. If you have gestational diabetes, dates are concentrated sugar — discuss portion and timing with your doctor and dietitian first; our gestational diabetes diet guide explains how to fit foods like these in.

Foods to be careful with: large amounts of unripe/green papaya (ripe papaya in moderation is fine and beneficial), raw or undercooked meat/fish/eggs, unpasteurised dairy and soft cheeses, high-mercury fish, more than about 200 mg caffeine a day, alcohol (none), and street food or cut fruit with hygiene risks.

Hydration: aim for 2.5–3.5 litres of fluids a day (more in summer, with exercise, or after vomiting/diarrhoea). Water is best, supported by coconut water, buttermilk, lemon water and ORS in hot weather. Good hydration supports amniotic fluid volume; dehydration can increase Braxton-Hicks.

Staying active is recommended through pregnancy unless your doctor has advised otherwise — WHO, FOGSI, ACOG and RCOG all endorse it for better weight control, lower gestational diabetes and preeclampsia risk, less back and pelvic pain, better mood and sleep, and easier labour and recovery. In late pregnancy the goal shifts from gaining fitness to maintaining strength, mobility and circulation, and preparing for birth.

A practical pattern: aim for about 150 minutes of moderate activity a week if comfortable (30 minutes on 5 days), or simply as tolerated — many women drop to 20–30 minutes on 3–4 days now, which is fine. Add daily pelvic floor work and 10–20 minutes on a birth-ball. Use the 'talk test': moderate intensity lets you chat but not sing.

Good options at week 31 include walking (the most accessible choice — 20–45 minutes most days), swimming or aqua-aerobics (buoyancy is wonderful for a heavy bump and swollen legs), a recumbent bike, prenatal yoga (Iyengar with props suits late pregnancy; avoid hot yoga), and birth-ball sitting and gentle rocking, which encourages an optimal baby position. Strong pelvic floor work matters most: our guide to Kegels and pelvic floor exercises covers correct technique and how to also practise relaxing the muscles for the pushing stage. From week 34 you can also begin daily perineal massage, which has good evidence for reducing tearing at delivery.

Modify for the late-pregnancy body: avoid lying flat on your back for long (use a wedge or side-lying), watch your balance, reduce intensity on hot or poorly slept days, and rest without guilt. Avoid contact sports, fall-risk activities (riding, advanced cycling on Indian roads), scuba diving, high altitude without acclimatisation, hot yoga, saunas and hot tubs, exercise to exhaustion, high-impact activity like running or jumping, and forced abdominal work like full sit-ups or planks (which worsen diastasis recti).

Stop exercising and contact your doctor for any vaginal bleeding, regular painful contractions, leaking fluid, dizziness or fainting, severe breathlessness, headache, chest pain, one-sided calf pain or swelling (possible clot), or reduced fetal movement.

Two India-specific tips: in summer, exercise in the cooler early morning or evening, hydrate hard, and use air-conditioned spaces if you can; in winter, check the AQI in north Indian cities and move indoors when pollution is high (AQI above 200). And do push back, gently but firmly, against the common belief that late pregnancy means complete bed rest — for most women that advice is wrong and is linked to clots, muscle loss and slower recovery.

Some symptoms need urgent attention. Contact your doctor or go to the nearest hospital with maternity services immediately if you notice any of the following.

Bleeding or severe pain: any vaginal bleeding is abnormal and can signal a placental problem or preterm labour. Severe abdominal pain with a tense uterus, or signs of heavy blood loss (dizziness, fainting, fast heartbeat, pale clammy skin), are emergencies — call 102 or 108. A light blood-tinged mucus 'show' on its own is a normal early-labour sign.

Leaking fluid: a gush or persistent trickle may mean your waters have broken. Go in to be assessed; greenish-brown (meconium-stained) fluid suggests the baby is distressed and needs urgent attention.

Preterm labour: regular painful contractions before 37 weeks (more than 4–6 an hour, with cramping or back pain), increasing pelvic pressure or a change in discharge. Reassuringly, a baby born at 31 weeks has a 95%+ survival rate in a good NICU — but get assessed promptly for steroids and possible treatment. Read more in our guide to preterm labour and its management.

Preeclampsia warning signs: a severe or persistent headache, vision changes (blurring, spots, flashes, light sensitivity), severe upper-abdominal pain, sudden swelling of the face and hands, or rapid weight gain (over 1 kg in a week). These need an urgent BP check — untreated severe preeclampsia can progress to seizures (eclampsia) or HELLP syndrome. See eclampsia: recognising and managing the emergency.

Reduced fetal movement: never ignore this. Lie on your left side after a meal or sweet drink and count distinct movements — 10 in 2 hours is the standard reassuring count. If you do not reach it, eat or drink something and recount; if it is still low, go to hospital that day or night for an NST. Decreased movement can be the first sign of a problem, and prompt checking can prevent stillbirth.

Other urgent symptoms: fever above 38°C (possible infection, UTI or pyelonephritis), burning urination with back pain, one-sided calf pain or swelling (possible clot), chest pain or severe breathlessness, severe palms-and-soles itching worse at night (possible obstetric cholestasis), the sudden 'worst headache of life', or severe persistent vomiting.

Mental health emergencies count too: thoughts of self-harm, hopelessness, severe anxiety stopping you functioning, or seeing/hearing things that are not there. Reach iCall (9152987821), Vandrevala Foundation (1860-2662-345), AASRA (9820466726) or NIMHANS Tele-MANAS (14416), and go to the nearest emergency department.

Keep these numbers saved: 102 Janani Express (free maternal ambulance), 108 (general emergency), your doctor's direct line and your hospital. Have your bag ready by week 34.

Late pregnancy brings a real mix of feelings, and they all deserve attention. It is common to swing between excitement about meeting your baby and anxiety about labour, between bursts of nesting energy and deep fatigue. Worries about the baby's position, your finances, joint-family dynamics or who can be present at the birth are normal — and if you have had a previous loss or fertility struggles, anxiety often peaks now. The cultural idea that mothers-to-be should be serenely happy in their final weeks simply does not match most women's reality.

Common late-pregnancy worries include birth pain and pain relief, whether labour will start on its own or need to be induced, and whether a caesarean might be needed. India's private metro chains report caesarean rates of 40–60% — far above the 10–15% WHO benchmark — so some women feel pushed toward early surgery that may not be medically necessary; a shared, informed decision with your doctor matters.

This is not rare. Antenatal depression and anxiety each affect a substantial share of pregnancies in India, and untreated maternal mental illness is linked to poorer outcomes for mother and baby — and predicts postnatal depression. The instinct to 'tough it out' or stop medication is usually the wrong one. Effective help exists: therapies like CBT, and where needed medication (sertraline is a common first-line SSRI in pregnancy) supervised by a perinatal-aware psychiatrist. Tele-therapy is widely available across India, and postpartum depression, if it follows, is very treatable.

Lean on support: a partner who listens rather than 'fixes', supportive family and friends, your childbirth-class peer group, and crisis lines such as iCall (9152987821), Vandrevala Foundation (1860-2662-345) and NIMHANS Tele-MANAS (14416). Culturally, the focus on the baby can overshadow the mother's wellbeing — your physical and emotional health deserve equal priority, and seeking care is your right, not a weakness.

Bonding often deepens now through strong kicks, daily kick counts, and talking, singing or reading to your baby (your partner can easily feel kicks too). Bonding intensity varies — some feel it strongly now, others more after birth — and both are completely normal.

Partner involvement makes a measurable difference now. Helpful partners ask how she is feeling without pressuring cheerfulness, join decisions about the hospital, birth plan and pain relief, attend antenatal visits, learn labour and comfort techniques together, take on more of the housework, and act as a buffer against well-meaning but conflicting family advice — so that diet, rest, activity and delivery choices rest with her and her doctor.

Partners have their own mix of joy and worry — about supporting her in labour, about becoming a parent, about money and change. Childbirth classes help here, and it is worth knowing that the partner's main job in labour is not 'doing' anything medical: it is calm presence, emotional support, advocacy and simple comfort measures (back rubs, water, position changes, encouragement).

The Indian joint-family setting offers genuine help — cooking, company, help with older children, traditional postpartum care — alongside genuine challenges: advice that conflicts with medical guidance, gender-preference pressure, and strong opinions about delivery method. The pressure can cut both ways: some elders insist 'normal delivery is the only real motherhood', while some private settings lean too readily toward elective caesarean for convenience or astrological timing. The medically sound stance is straightforward — a caesarean when it is genuinely indicated (and there is no shame in needing one), and a vaginal birth when there is no contraindication. A polite 'my doctor advised this' is a useful shield, and our guide to shared decision-making on caesarean birth helps you ask the right questions, including your hospital's caesarean rate.

Finalise a one-page birth plan with your doctor covering who will be present, pain-relief preference, labour positions, episiotomy (only if clinically needed — routine episiotomy is no longer recommended), immediate skin-to-skin, delayed cord clamping, early breastfeeding and the baby's vitamin K injection. Remember it is a set of preferences, not a contract — clinical situations may need flexibility. Draft it as a starting point with your doctor, and if you want continuous labour support, ask about hiring a doula.

On the practical side: confirm when your maternity leave starts (the Maternity Benefit Act gives 26 weeks of paid leave for the first two children at eligible workplaces, usually started around week 34–36), plan a work handover, and line up postpartum help (a japa maid or postpartum doula). And protect some couple time before the baby arrives. If a family situation involves coercion or abuse, the women's helpline (181), women's safety line (1091) and the NCW helpline (7827-170-170) can help — your healthcare team should know about anything seriously affecting your wellbeing.

Week-31 costs centre on the routine visit plus any tests or monitoring. A private obstetric visit runs about Rs 500–2500; the same care at a government PHC, CHC, district hospital or medical college is free under JSSK, including tests, ultrasounds, medicines, delivery and 102 ambulance transport.

Typical private test costs in late pregnancy: the GBS swab at 35–37 weeks (Rs 500–1500, where offered), a CBC anaemia recheck (Rs 200–600), urine routine and culture (Rs 100–500), a growth scan or fetal Doppler (Rs 1500–3500), a biophysical profile (Rs 2000–4500), and an NST (Rs 500–1500 per session, often weekly from week 36).

Delivery packages vary widely. In metro private chains, a normal vaginal delivery is roughly Rs 60,000–1,50,000 and a caesarean Rs 1,00,000–4,50,000; standalone tier-2 clinics are lower (about Rs 25,000–80,000 for a normal delivery). An epidural typically adds Rs 5000–15,000, and NICU care is billed separately if needed. Government facilities are free under JSSK, including delivery, surgery, NICU and postnatal care.

Ongoing supplements (iron, calcium, vitamin D, folic acid, a prenatal multivitamin and omega-3 DHA) cost about Rs 500–2500 a month, and many women add dates from week 36. Birth-preparation costs include hospital-bag supplies (Rs 2000–8000), childbirth classes (Rs 3000–15,000) and optional postpartum help.

Know your schemes and cover: PMSMA (free specialist review on the 9th of each month), JSSK (free comprehensive maternity care), PMMVY (Rs 5000 for the first live birth) and JSY (cash for institutional delivery). Check your employer health insurance for maternity cover, waiting periods and sub-limits, and whether Ayushman Bharat PMJAY, CGHS, ESI or a state scheme applies to you. Budget early for the often-forgotten extras — transport to weekly visits, paediatric and vaccination costs, breastfeeding supplies, diapers and newborn essentials — which together can run from Rs 1,50,000 to several lakh in private care, but are largely covered through the JSSK and PMMVY pathway.

• WHO recommendations on antenatal care for a positive pregnancy experience
• ACOG — Prevention of Group B Streptococcal Early-Onset Disease in Newborns
• ACOG — Gestational Hypertension and Preeclampsia
• NHS — You and your baby at 31 weeks pregnant
• ICMR-NIN — Dietary Guidelines for Indians (2024) and RDA
• Ministry of Health & Family Welfare — Janani Shishu Suraksha Karyakram (JSSK)
• National Family Health Survey (NFHS-5) 2019–21, India
• Razali N et al. Date fruit consumption at term: effect on length of gestation, labour and delivery (J Obstet Gynaecol)