What people believe
The belief that stress — from work, arguments, bad news, anxiety, or emotional upset — can directly cause a miscarriage is deeply entrenched. It creates a cruel dynamic: women who experience pregnancy loss blame themselves for being too stressed, too busy, or too worried. Friends and family sometimes reinforce this with comments like "you need to relax" or "you were working too hard." The implication is that if you had been calmer, the pregnancy would have survived.
What the evidence says
The overwhelming majority of early miscarriages (before 12 weeks) are caused by chromosomal abnormalities in the embryo — genetic errors that occur at or shortly after fertilisation. These are random events that cannot be caused or prevented by the mother's emotional state, stress level, or daily activities.1
ACOG is explicit: miscarriage is not caused by stress, exercise, working, or most day-to-day activities.2 The Royal College of Obstetricians and Gynaecologists (RCOG) similarly states that emotional stress has not been shown to cause miscarriage.3
While some research has explored a theoretical link between extreme, chronic physiological stress (such as that experienced during famine or war) and adverse pregnancy outcomes, the evidence does not support a causal relationship between the normal stress of everyday life — including work stress, anxiety, arguments, or emotional distress — and miscarriage.4
This distinction matters because the myth actively harms women. It transforms grief into guilt. It implies personal responsibility for a biological event that was, in the vast majority of cases, entirely outside anyone's control.
What to do instead
If you are pregnant and stressed, managing stress is good for your overall wellbeing — but not because it prevents miscarriage. If you experience a pregnancy loss, know that it was not caused by your stress, your job, your argument with your partner, or your anxiety. Seek support from your provider, and resist anyone who implies otherwise.