miscarriage
n. C / Un. the natural loss of a pregnancy before the baby is developed enough to survive outside the mother. It is a medical event that happens early in a pregnancy.
n. the spontaneous expulsion of a human foetus from the womb before it is viable. Often used in the phrase 'miscarriage of justice' to describe a failure of the court system.
She was very sad after her miscarriage.
The doctor explained that a miscarriage often happens because the pregnancy is not developing normally.
From mis- + carriage.
Countable when referring to a specific event; uncountable when discussing the medical phenomenon in general.
she had a miscarriage of her babyshe had a miscarriageThe word 'miscarriage' already implies the loss of a pregnancy; adding 'of her baby' is redundant.