In everyday Indian usage 'abortion' usually means a miscarriage, which doctors call spontaneous abortion. About half of early miscarriages are caused by a chromosome error in the embryo that happens by chance at conception; the rest are linked to the mother's age, womb or hormone problems, conditions such as diabetes or thyroid disease, infections and smoking. Stress, work, exercise and sex do not cause miscarriage. Induced abortion, the deliberate ending of a pregnancy, is legal in India on specific grounds under the Medical Termination of Pregnancy Act.
Does 'abortion' mean miscarriage or termination?
In India the word covers both, and the cause depends on which one is meant. ACOG explains that the loss of a pregnancy before 13 completed weeks is called early pregnancy loss, and may also be called a miscarriage or spontaneous abortion. The NHS defines miscarriage as the loss of a pregnancy before 24 weeks. The Medical Termination of Pregnancy (Amendment) Act 2021, as published in the Gazette of India, defines 'termination of pregnancy' as a procedure to terminate a pregnancy by using medical or surgical methods; that is induced abortion, a decision rather than an event. Most of this guide is about miscarriage; the legal grounds for termination are covered near the end.
Miscarriage is common. ACOG puts early pregnancy loss at about 10 of 100 known pregnancies, and NICHD cites the same 10% figure. MedlinePlus gives a range of 10% to 25% among women who know they are pregnant and says most miscarriages occur during the first 7 weeks. A 2023 study in Nature Medicine cites a prevalence of 10% to 15% of all clinically recognised pregnancies, says loss mostly occurs before weeks 8 to 9, and reports that 10.8% of women experience at least one pregnancy loss, 1.9% two and 0.7% three.
Many losses happen before a test is done. MedlinePlus says around half of fertilised eggs are lost, usually before the woman knows she is pregnant.
Is a chromosome error the main cause of miscarriage?
Yes. ACOG says about half of early miscarriages happen when the embryo does not develop properly, most often because of an abnormal number of chromosomes: if an egg or sperm carries more or fewer chromosomes than normal, the embryo will too. Cleveland Clinic gives the same figure, that chromosomal disorders cause about half of all miscarriages, and NICHD says too many or too few chromosomes can affect survival.
The laboratory evidence matches. The 2023 Nature Medicine study karyotyped the products of conception from 1,745 spontaneous losses collected over 35 years and found 879 (50.4%) were chromosomally abnormal, with maternal and paternal age each independently raising the rate. Extra copies of chromosomes 16 and 7 were the most common findings in first-trimester loss. A 2021 Cureus study of 150 couples with repeated miscarriage from northern India states that chromosomal abnormalities, parental or arising anew in the embryo, account for 50% to 60% of first-trimester loss.
These errors occur at random when the egg or sperm forms. ACOG stresses that in almost every case miscarriage is not a woman's fault and is usually a random event. A single miscarriage from a chromosome error says nothing about the next pregnancy, and NHS guidance is that testing for a cause starts after three or more miscarriages.
How does the mother's and father's age affect the risk?
Risk climbs with the mother's age, because chromosome errors in eggs become more frequent. Cleveland Clinic says studies put the risk at 9% to 17% for women in their 20s, rising to 40% by age 40. ACOG says that for women over 40 about 1 in 3 pregnancies ends in miscarriage, and most of those end because of a chromosome abnormality. NICHD says chromosome problems are more common in parents over 35 and that the risk is much higher at 45 than at 35. MedlinePlus describes the same curve: higher after 30, higher again between 35 and 40, and highest after 40.
| Mother's age | Miscarriage risk in known pregnancies | Source |
|---|---|---|
| 20s | 9% to 17% | Cleveland Clinic |
| 35 and over | Risk factor; chromosome errors more common | NHS, NICHD |
| 40 | About 40%, or about 1 in 3 | Cleveland Clinic, ACOG |
| 45 | 'Much higher' than at 35 | NICHD |
The father's age counts too. The NHS lists the baby's father being aged 45 or over as a risk factor. ACOG says there is some evidence that chromosome abnormalities in the embryo increase as men get older, though it is not clear at what age this begins. The Nature Medicine analysis found paternal age raised the chance of an abnormal karyotype independently of maternal age.
Age is a reason to book care early with a gynaecologist, not a reason to avoid pregnancy.
Which health conditions and infections raise the risk?
Conditions that disturb hormones, blood clotting, the immune system or the womb itself raise the risk. The NHS lists polycystic ovary syndrome, diabetes, a blood-clotting condition, a thyroid condition such as underactive thyroid, a problem with the womb, low progesterone and vitamin D deficiency. NICHD adds high blood pressure, autoimmune disorders, problems with the placenta, cervix or uterus, and problems with the father's sperm. MedlinePlus lists uncontrolled systemic disease such as diabetes, physical problems with the reproductive organs and immune problems.
Infections matter in a narrower way. NICHD names untreated gonorrhoea and Zika as examples. MedlinePlus lists infection among possible causes and tells women to seek immediate care for fever, bleeding that does not stop, cramping or foul-smelling discharge during or after a loss, because these can signal infection of the womb.
The practical point for Indian readers is that several of these are testable and treatable before the next pregnancy:
- Thyroid: a TSH and free T4 panel; see thyroid test cost.
- Diabetes: fasting glucose or HbA1c.
- Womb shape, fibroids, septum: a pelvic ultrasound; see ultrasound cost.
- Clotting and immune disorders, and parental chromosome tests: usually after repeated loss. The Cureus study found a parental chromosome anomaly in 7% of individuals from couples with three or more losses and in none of the control couples.
The NHS says that after three or more miscarriages you will usually be referred for tests to find out if there is a cause that can be treated, and that support is offered.
Do smoking, alcohol, caffeine and weight cause miscarriage?
They raise the risk, and they are the causes a woman can change. The NHS lists smoking, drinking alcohol, drinking a lot of caffeine, living with obesity or being underweight, and exposure to harmful chemicals or high levels of air pollution. NICHD puts a number on caffeine: more than 200 milligrams a day, which it equates to about one 12-ounce (roughly 350 ml) cup of coffee. Cleveland Clinic says smoking, drinking alcohol or using recreational drugs increases risk and that obesity or being underweight can play a role. MedlinePlus includes drug or alcohol use, smoking and environmental toxins.
| Factor | What the sources say | Source |
|---|---|---|
| Smoking | Increases risk | NHS, Cleveland Clinic, MedlinePlus |
| Alcohol | Increases risk; no safe amount given | NHS, NICHD, Cleveland Clinic |
| Caffeine | Risk above 200 mg a day, about one large cup of coffee | NICHD |
| Recreational drugs | Increases risk | Cleveland Clinic, NICHD |
| Obesity or underweight | Can play a role | NHS, Cleveland Clinic, NICHD |
| Chemicals, air pollution | Risk factor | NHS, NICHD |
The sources give no figure for tea or Indian filter coffee, so keep intake modest rather than counting cups. Tobacco is best stopped before conception, and a general physician can help with quitting.
What does not cause a miscarriage?
Ordinary daily life does not cause a miscarriage, and the major authorities say so in plain words. ACOG states that working, exercising, stress, arguments, having sex, or having used birth control pills before getting pregnant do not cause miscarriage, and that morning sickness also does not. Cleveland Clinic says there is no scientific proof that stress, exercise, sex or birth control pills cause miscarriage, and adds: a miscarriage is not your fault; nothing you did or did not do caused it. NICHD goes further on nausea, noting that morning sickness is linked to a lower risk of pregnancy loss.
Common beliefs in India that the sources do not support:
- Lifting a bucket, climbing stairs, travelling by bus or scooter, or bending to mop.
- Eating papaya, pineapple, sesame or 'heating' foods. No cited authority lists any food as a cause.
- A shock, bad news, an argument or grief.
- Sex during early pregnancy.
- Having taken oral contraceptive pills in the past.
Two cautions keep this honest. ACOG notes that a few medications can cause miscarriage, so every medicine, including Ayurvedic or herbal preparations, should be checked with a doctor in early pregnancy. And a fall or heavy blow to the abdomen is an injury that needs assessment on its own merits; it is simply not the hidden cause of the typical early loss, which was decided at conception. The guilt that follows a miscarriage is common and misplaced; the chromosome data above is the strongest answer to it.
What are the legal grounds for induced abortion in India?
Induced abortion is legal in India on grounds in section 3 of the Medical Termination of Pregnancy Act 1971, as amended in 2021 (Act No. 8 of 2021). The Gazette text allows a registered medical practitioner to terminate a pregnancy up to 20 weeks on one practitioner's opinion, and between 20 and 24 weeks on the opinion of at least two practitioners for categories of women prescribed by rules, where the good-faith opinion is that continuing the pregnancy would risk the woman's life or cause grave injury to her physical or mental health, or that there is a substantial risk the child would suffer a serious physical or mental abnormality.
Where a pregnancy follows failure of a contraceptive used by any woman or her partner, the anguish may be presumed a grave injury to her mental health; where she alleges rape, it shall be presumed so. The week limits do not apply where a state Medical Board (a gynaecologist, a paediatrician and a radiologist or sonologist) diagnoses substantial foetal abnormalities.
The 20 to 24 week categories are in Rule 3B of the MTP Rules 2021. A 2023 commentary in Sexual and Reproductive Health Matters lists them as survivors of rape or incest, minors, women whose marital status changed through widowhood or divorce, women with disabilities, women with a foetal anomaly, and women in emergency, disaster or humanitarian settings, and reports the Supreme Court's September 2022 ruling that unmarried women have the same right. The Rules could not be opened for this guide; confirm with a provider.
When should you seek care urgently?
Seek care the same day for bleeding with pain in pregnancy, and call an ambulance for heavy bleeding or faintness. The NHS says the main symptom of miscarriage is vaginal bleeding before 24 weeks, often with lower tummy pain and cramping, sometimes pink, grey or white lumps or a leak of fluid; sometimes there are no symptoms and the loss is found at a scan (a missed miscarriage).
Call 112 or go straight to the nearest government or private hospital emergency department if you are pregnant and have bleeding with severe tummy pain, pain in your shoulder, feel sick, faint or dizzy, pass clots larger than a golf ball, or are soaking a pad soon after putting it on. These are the NHS and Cleveland Clinic signs of bleeding that needs immediate treatment, including a possible ectopic pregnancy.
Diagnosis is by a transvaginal scan with blood or urine tests, the NHS says. ACOG explains that the scan checks whether the pregnancy is growing and whether there is cardiac activity, and that a low or falling hCG can mean the pregnancy has been lost; several scans and tests may be needed to confirm it. After an early miscarriage the NHS options are waiting for the tissue to pass, usually about 2 weeks, medicine, or a procedure. Periods return within 4 to 8 weeks (MedlinePlus, NHS). A gynaecologist can arrange the scan and tests; prices are on the ultrasound cost page. This guide is general information from the sources listed below, not medical advice; a registered doctor makes decisions with you.
