It has no reason. No cause. No trigger that you could name. This emptiness was already there before you could speak. Before you could think. Perhaps even before you could breathe.
You carry it like a background hum in your nervous system. Sometimes quieter, sometimes so loud that you don’t know where to turn. But you’ve learnt to mask it. You function. You smile. You’re there for others. And at night, when everything falls silent, you feel that void. Not in your heart – deeper. In your body. In your cells.
If something feels tight as you read these lines, then keep reading. Not because this article has all the answers, but because it asks a question you may never have allowed yourself to ask: what if you didn’t start out alone?
Table of contents
What is a vanishing twin? – Vanishing twin syndrome explained
What is proven, and what is hypothesis? – An honest assessment
Typical symptoms of the single-born twin
Why the body remembers what the mind has forgotten
Self-test: The Lost Twin – 25 questions with scoring
Interpretation of your overall result
Coming to terms with a lost twin: paths to healing
Frequently asked questions about the lost twin
What is a vanishing twin? – Vanishing twin syndrome explained
It is not an esoteric construct. But neither is it as simple as some self-help guides make it out to be.
In Vanishing Twin Syndrome (also known as VTS), one of two or more embryos dies, disappears or is wholly or partially absorbed in the womb. What began as a multiple pregnancy becomes a singleton pregnancy. The term ‘lost twin’ – also known as a ‘single-born twin’ – describes the surviving child.
We now know that from the ninth week of pregnancy – as soon as their hands begin to form – twins interlock their hands. They touch one another. In the fourth month of pregnancy, they move deliberately towards one another. Italian researchers have documented this. The bond does not begin after birth – it begins with the very first touch.
If this connection is suddenly severed, the surviving embryo loses its first relationship. Not as a thought. Not as a conscious memory. But as a physical state that may become deeply ingrained.
What is proven, and what is hypothesis? – An honest assessment
It’s worth making a clear distinction here. What do we know? What do we suspect? And what remains open to question?
What is medically documented
Vanishing twin syndrome has been documented by ultrasound since the 1980s. Up to 30 per cent of all pregnancies begin as multiple pregnancies. The rate is even higher for IVF pregnancies. In many cases, the second embryo is lost during the first trimester – as bleeding that is interpreted as a harmless complication. Most parents never find out about it. These are not assumptions. These are data.
What has been observed but not proven
Whether the surviving embryo ‘registers’ this loss – and whether it leaves lifelong psychological traces – is another matter. Piontelli has described cases in which children exhibited behaviour after birth that pointed to their prenatal situation. She published this as an observation – as a question, not as an answer.
Austermann, Steinemann and Schlochow have gathered therapeutic observations over many years. In my own practice, I see these patterns regularly. However, there is no randomised study proving a causal link. This must be taken seriously. It is not hard evidence.
What remains to be clarified
Can an embryo feel anything in the sixth week? Can the body remember something that predates conscious memory? Why do some people feel deeply drawn to this topic whilst others are not at all? There are no definitive answers to these questions.
Assessment: Not all surviving twins suffer from this early loss in adulthood. The lost twin model is helpful when it provides structure and relief. It is unhelpful when it takes over everything. Not every sense of emptiness signifies a lost twin.
Typical symptoms of the single-born twin
The signs of an early twin loss are subtle. No single symptom is conclusive evidence. But if several of the following experiences occur repeatedly and the usual explanations have never quite fitted, it is worth taking a closer look.
I have been encountering these patterns in my practice for many years. Not all clients who feel this resonates with them have actually experienced the loss of a twin. But for some, something that previously had no name suddenly falls into place.
Emotional symptoms of the lost twin
- Inexplicable sadness or longing – a sense of loss that cannot be pinned down to specific life events
- Deep empathy to the point of being overwhelmed – as if one had learnt to feel for two in a world meant for two
- A lack of basic trust – the world fundamentally feels unsafe
- Survivor’s guilt – a vague sense of guilt at ‘taking up too much space’
- An underlying depressive mood – a melancholy that lies beneath everything like a fundamental tone
Relationship patterns among single-born twins
- On/off relationships – constantly oscillating between closeness and distance
- The search for a soulmate – an unfulfilled longing for a deep connection
- Simultaneous fear of attachment and loss – the fear of being abandoned again
- Inability to set boundaries – difficulty sensing one’s own limits
- ‘Hunger for skin’ – an intense craving for physical closeness and touch
Physical and psychological symptoms
- Chronic tension – which cannot be permanently relieved even by massage
- Numbness or emotional detachment (depersonalisation) – as if part of one’s perception were cut off
- High sensitivity – above-average sensitivity to stimuli and moods
- Fear of loss and panic attacks – which seem to arise out of nowhere
- Addiction and dependencies – attempts to numb inner pain
- Restlessness and insomnia – an inner agitation that never quite settles
Important: Each of these symptoms may also have other causes. The lost twin model is one possible explanation amongst many – it is not a diagnosis.
Why the body remembers what the mind has forgotten
Do embryos have a memory? Many researchers are convinced they do. This is not a biographical memory in the traditional sense, but rather a kind of biological recording that may even precede the full development of the nervous system.
This knowledge is not stored as an image or a story. It is stored as a physical state. As tension. As a vague sense of anxiety. As the feeling of never being fully present. The body seems to store more than the conscious mind can recall – in a language we often do not understand.
Vanishing Twin Syndrome and basic trust
Basic trust – that fundamental feeling that the world is a safe place – develops in the very earliest moments of existence. If that first connection ends abruptly, this basic trust can be deeply shaken. In attachment behaviour, this often manifests as deep ambivalence: a longing for connection coupled with a fear of losing someone again.
Self-test: The Lost Twin – 25 questions with scoring
This well-researched self-assessment helps you to make sense of your inner experiences. It is not a diagnostic tool, but rather a means of reflection – compiled on the basis of specialist psychological literature on Vanishing Twin Syndrome.
Please note: This test is not a substitute for a clinical diagnosis. It was compiled by psychotherapist Ernestina Mazza based on specialist literature (Austermann, Steinemann, Schlochow, Chamberlain). If you are experiencing persistent psychological distress, please consult a qualified professional.
Instructions: Rate each statement on a scale of 0 to 4.
0 = No, never
1 = Rarely
2 = Sometimes
3 = Often
4 = Almost always
Interpretation of your overall result
0–20 points: Slightly pronounced
The patterns described do not really apply to you. However, if the topic has struck a chord with you, this should be taken seriously.
21–45 points: Moderately pronounced
You show moderate indications in several areas. This doesn’t mean you’re ‘affected’ – it means it’s worth taking a closer look.
46–70 points: Clearly pronounced
Your result shows clear indications. People with similar results often report that exploring this topic provides them with an explanation for the first time. Professional support is recommended.
71–100 points: Highly pronounced
You describe a high level of intensity in most areas. We recommend that you discuss this result with a qualified therapist.
Coming to terms with a lost twin: paths to healing
If this test has resonated with you – regardless of the result – then it has served its purpose. It is not about a diagnosis. It is about putting into words something you may have been sensing for a long time.
1. Find out more. Read ‘Das Drama im Mutterleib’ (Austermann) or ‘Der verlorene Zwilling’ (Steinemann). Well-researched, not esoteric.
2. Talk about it. With a trusted person or a qualified therapist who is familiar with prenatal trauma.
3. Put it into practice. In the ‘Healing the Lost Twin’ seminar, you’ll explore the topic across four modules – featuring theory, body exercises, systemic constellation work and five guided meditations.
Seminar: Healing the Lost Twin
2 live sessions • 4 modules • 5 meditations • 6-week programme • EUR 220
Next start date: Wednesday, 29 April 2026
Location: Online via Zoom or in person in 8010 Graz
Frequently asked questions about the lost twin
How common is vanishing twin syndrome?
Ultrasound studies show that up to 30 per cent of all pregnancies begin as multiple pregnancies. With IVF, the rate is even higher.
How do I know if I am a single-born twin?
You don’t need to ‘know’ it. The self-assessment above helps you to make sense of your experiences. If you recognise yourself in the patterns described, it’s worth taking a closer look.
Is this scientifically proven?
The biological phenomenon has been documented. The long-term psychological effects have been observed in a therapeutic context, but have not been substantiated by randomised trials.
Can a lost twin be healed?
Here, ‘healing’ means: recognising, putting into context and integrating the loss – not forgetting it.
What is the difference between a ‘lost twin’ and a ‘single-born twin’?
Both terms describe the same phenomenon. ‘Lost twin’ emphasises the loss, whilst ‘single-born twin’ emphasises the surviving person.
Sources & further reading
- Austermann, A. & Austermann, B. (2006). Das Drama im Mutterleib. Der verlorene Zwilling. Königsweg-Verlag.
- Steinemann, E. (2006). Der verlorene Zwilling. Munich: Kosel.
- Schlochow, B. (2007). Gesucht: Mein verlorener Zwilling. Zurich: Edition à la carte.
- Chamberlain, D. (1995). I bambini ricordano la nascita. Pavia: Edizioni Bonomi.
- Soldera, G. (2000). Le emozioni della vita prenatale. Cesena: Macroedizioni.
- Mayer, N. (1998). Der Kain-Komplex. Bern: Integral-Verlag.
- Harms, T. (ed.) (2000). Auf die Welt gekommen. Berlin: Ulrich Leutner Verlag.
© 2026 akademie bios® • Dott.ssa. Mag. Dipl. Päd. Ernestina Mazza
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