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About half of early losses come down to a random chromosomal error at conception. Here is the full picture, including the long list of things that get blamed and do not do it.
Reviewed by Dr. Grishma Ranjangaonkar, MBBS, DGO, ICOG Fellowship in Gynecological Endoscopy · Eva WomanCare Clinic, Vashi, Navi Mumbai
Almost every woman who sits down with us after an early loss arrives with a theory about what she did. It is usually lifting something, or a stressful week, or a long journey. We would rather deal with that first than at the end, because in a first-trimester miscarriage the honest answer is that it was almost certainly nothing you did, and that answer holds even when the timing seems to fit perfectly.
The short version
If you are reading this in the days after a loss, the single most useful sentence in the whole article is this one: it was almost certainly not caused by anything you did. That is not a kindness we offer to make people feel better. It is what the evidence actually shows, and it is the reason the first half of this article is about what does not cause miscarriage rather than what does.
Early miscarriage is common. Roughly one in five recognised pregnancies ends this way, and the great majority happen in the first twelve weeks. Common does not mean small, and nobody experiences it as a statistic. But it does mean that a loss is far more often ordinary biology than a sign that something is wrong with you.
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Cause
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How common
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What it means in practice
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Notice how the table is weighted. The largest cause is the one nobody can influence, and the causes people spend the most emotional energy on sit at the bottom with modest effects. That imbalance is uncomfortable, and it is also the truth of it.
Myth
“Lifting something heavy caused it”
What is actually true
This is the one we hear most, usually about a toddler. Lifting, carrying, stretching upwards and climbing stairs have all been looked at and none of them cause early miscarriage. The uterus in the first trimester sits behind the pubic bone, well protected, and it is not affected by what your arms are doing.
Myth
“It happened because of stress, or an argument, or bad news”
What is actually true
Ordinary stress does not cause miscarriage. Studies looking specifically at bereavement, job loss and severe life events have not found the effect people expect, and the pregnancies that continue through genuinely terrible circumstances are the everyday evidence for it. Stress deserves attention because it is hard to live with, not because it ends pregnancies.
Myth
“Sex, exercise or travel brought it on”
What is actually true
None of the three. Sex in an uncomplicated pregnancy is safe throughout. Moderate exercise is actively recommended. Travel, including flying, does not cause first-trimester loss. There are situations where we advise pausing one of these, and if that applies to you we will say so specifically rather than leaving you to guess.
Myth
“Something I ate did it”
What is actually true
The genuine food precautions in pregnancy are about infection and about vitamin A, and they are covered properly in our article on foods to avoid during pregnancy. Papaya, pineapple and the rest of the local list are not causes of miscarriage in the quantities anyone eats.
Myth
“A previous abortion or a contraceptive pill was responsible”
What is actually true
A safely performed termination does not cause later miscarriage, and neither does previous use of the pill, the injection or an intrauterine device. Fertility returns to your own baseline once a method is stopped, and our contraception guide sets out what that looks like for each one.
Bleeding in early pregnancy is common and does not always mean a miscarriage. Something like one in four pregnancies bleeds at some point in the first twelve weeks and most of those continue perfectly well. That uncertainty is genuinely hard to sit with, which is why the rule is to be assessed rather than to wait and see.
Heavy bleeding, soaking through a pad in an hour or passing large clots. Severe or one-sided pain, particularly with shoulder-tip pain or feeling faint, which needs an ectopic pregnancy ruled out urgently. Fever with bleeding. Bleeding after a positive test when you have not yet had a scan to confirm the pregnancy is in the right place.
After a single early loss, testing almost never finds anything, and being told everything is normal after a full workup is its own kind of frustration. The formal definition of recurrent miscarriage is three or more first-trimester losses, and that remains the threshold in the RCOG guidance. In practice most doctors, ourselves included, will offer investigation after two if there is any reason to suspect a pattern, and always after two if you are over thirty-five or have another risk factor.
What that workup usually involves:
If a septum, polyp or submucosal fibroid turns up, correcting it is usually a day procedure, and our laparoscopic and hysteroscopic surgery guide explains what that involves. If nothing is found, which is the commonest outcome, that is genuinely better news than it feels like: the chance of a successful next pregnancy after unexplained recurrent loss remains high.
There is no medical reason to wait several months. Once bleeding has settled and you feel ready, you can try again, and there is no evidence that waiting improves the outcome. One cycle makes the dating of the next pregnancy easier, which is the only practical argument for a short wait. Everything else about the timing is about you rather than about your body.
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Before trying again
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Why it helps
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When
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Our trying to conceive guide covers timing and the preconception checks in more detail, and the ovulation calculator is a straightforward way to work out your window once cycles have settled.
The proportion of first-trimester miscarriages attributable to chromosomal abnormality, the definition of recurrent miscarriage as three or more first-trimester losses, and the recommended investigations including antiphospholipid antibodies and assessment of the uterine cavity follow RCOG Green-top Guideline No. 17 on recurrent miscarriage. Management options for early pregnancy loss and the assessment of bleeding in early pregnancy follow NICE NG126 on ectopic pregnancy and miscarriage. This article is general information and does not replace an assessment with your own doctor.
Dr. Grishma Ranjangaonkar
MBBS, DGO · ICOG Fellowship in Gynecological Endoscopy · Maharashtra Medical Council Reg. No. 2014041327
Dr. Grishma has more than fifteen years of clinical experience and practises at Eva WomanCare Clinic in Vashi, seeing women from across Navi Mumbai including Kopar Khairane and Turbhe. Her work spans fertility and pregnancy care, PCOS and menstrual health, and keyhole gynecological surgery.
What is normal week by week in the first twelve, and the signs that need a call today.
Bleeding, pain and the rest, sorted into go now, call today, or mention next visit.
The checks worth doing before the next pregnancy, and how timing actually works.
Tick what you are experiencing and see how urgently it should be seen.
A scan and a blood test answer in an afternoon what an evening of reading cannot. And if you have had two losses and nobody has offered you any testing, that is a conversation worth having. We see women from Vashi, Kopar Khairane, Turbhe and Nerul for both, and neither appointment is a long one.
