Losing a pregnancy is one of the hardest experiences a woman can go through, and the first question most people ask afterward is simple: why did this happen? If you or someone you love has faced a miscarriage, you are not alone. Miscarriage is far more common than most people realise, and in most cases, it has nothing to do with anything you did or didn’t do.
Understanding the causes of miscarriage can help you make sense of what happened, ease unnecessary guilt, and prepare you for a healthier pregnancy in the future. As a gynaecologist in Rohini with years of experience guiding women through pregnancy and loss, Dr. Rachna at Manasvi Healthcare often meets patients searching for answers. This guide explains the main miscarriage causes in simple terms, based on current medical understanding.
What Exactly Is a Miscarriage?
A miscarriage is the loss of a pregnancy before 20 weeks. Most miscarriages happen in the first trimester, within the first 12 weeks, and are usually linked to problems that occur very early in the baby’s development. Miscarriages that happen later in pregnancy tend to have different underlying reasons, often connected to the mother’s health rather than the baby.
It’s important to know that a single miscarriage rarely signals a serious underlying problem. Most women who miscarry go on to have healthy pregnancies afterward.
Major Causes of Miscarriage
1. Chromosomal and Genetic Abnormalities
This is the single biggest reason for early miscarriage. When an egg and sperm combine, the resulting embryo needs the correct number and arrangement of chromosomes to develop properly. If something goes wrong during this process, the embryo often cannot survive, and the body ends the pregnancy naturally. This is not caused by anything the parents did; it’s essentially a random error in cell division. The risk of this type of abnormality increases with the age of both partners, particularly after 35.
2. Hormonal Imbalances
Adequate levels of hormones like progesterone are essential to support the uterine lining and sustain early pregnancy. Conditions such as polycystic ovary syndrome (PCOS) or thyroid disorders can disrupt this hormonal balance, making it harder for a pregnancy to continue normally.
3. Uterine Abnormalities
Structural issues with the uterus, such as fibroids, polyps, scarring from previous surgery, or a uterus shaped differently than usual, can interfere with implantation or restrict the space a growing baby needs. These conditions are often treatable once identified.
4. Underlying Health Conditions
Long-term conditions like uncontrolled diabetes, autoimmune disorders, and blood clotting problems can raise the risk of miscarriage, especially in the second trimester. Blood clotting disorders can reduce blood flow to the placenta, limiting the oxygen and nutrients reaching the baby. Women with known chronic conditions are usually advised to have their health carefully managed before and during pregnancy.
5. Infections
Certain infections picked up during pregnancy, including some sexually transmitted infections and food-borne illnesses like listeriosis or toxoplasmosis, can increase miscarriage risk. This is one of the reasons doctors advise caution around unpasteurised dairy, undercooked meat, and raw eggs during pregnancy.
6. Cervical Weakness
Sometimes called cervical insufficiency, this happens when the cervix opens too early under the weight of the growing baby, usually in the second trimester. It can often be identified in advance and managed with monitoring or a minor procedure.
7. Lifestyle and Environmental Factors
Smoking, excessive alcohol consumption, high caffeine intake, and obesity have all been linked to a higher risk of miscarriage. While these factors alone rarely cause a single miscarriage, they can add to overall risk, particularly in cases of recurrent loss.
8. Age of the Parents
As women age, both the number and quality of eggs decline, which raises the chance of chromosomal issues in the embryo. Sperm quality can also decline with paternal age. This is why age is one of the most consistent risk factors doctors discuss with couples trying to conceive later in life.
When Miscarriage Happens More Than Once
If a woman experiences two or three miscarriages in a row, doctors usually recommend a more detailed evaluation. This can include blood tests for clotting disorders and hormone levels, genetic testing for both partners, and an ultrasound or scan to check the shape of the uterus. Even after thorough testing, about half of recurrent miscarriage cases have no clearly identified cause, which can be frustrating but does not mean future pregnancies are doomed to fail.
When to Consult a Gynaecologist
You should see a gynaecologist in Delhi promptly if you experience:
- Heavy bleeding or passing large clots during pregnancy
- Severe abdominal or pelvic pain
- Two or more consecutive pregnancy losses
- Signs of infection, such as fever or unusual discharge, after a miscarriage
- Anxiety or emotional distress that is affecting your daily life
Early evaluation allows your doctor to check for treatable causes and offer guidance on the safest path forward for your next pregnancy.
Why Choose Dr. Rachna at Manasvi Healthcare
Dr. Rachna has more than 18 years of experience in gynaecology, obstetrics, and infertility care, and is an active member of FOGSI and AOGD. At Manasvi Healthcare, a government-approved nursing home and MTP centre in Rohini, she offers compassionate, personalised evaluation for women who have experienced pregnancy loss, along with pre-conception counselling to support healthier pregnancies going forward. Patients often describe her as an attentive listener who takes the time to explain what happened and what comes next.
Miscarriage is a deeply personal loss, but understanding its causes can bring some clarity during a painful time. Most miscarriages result from factors beyond anyone’s control, particularly chromosomal issues in early pregnancy. If you’ve experienced a miscarriage or are worried about your risk, speaking with an experienced gynaecologist can help you understand your situation and plan confidently for the future. Dr. Rachna and the team at Manasvi Healthcare in Rohini, Delhi, are here to support you with compassionate, expert care at every step.
There is no strong evidence that everyday stress directly causes miscarriage. Most miscarriages happen because of chromosomal or medical factors, not emotional stress.
No, since these occur randomly during cell division, they cannot be prevented. However, maintaining good overall health before conception can support a healthier pregnancy overall.
This varies from person to person. Many doctors suggest waiting until after one normal menstrual cycle, but your gynaecologist can advise based on your specific situation.
No. Most women who have a single miscarriage go on to have a successful pregnancy afterward.
Current evidence does not show that bed rest reduces miscarriage risk in most cases, though your doctor may still recommend it for specific medical reasons.