miscarriage
n.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.”
Countable when referring to a specific event; uncountable when discussing the medical phenomenon in general.
The word 'miscarriage' already implies the loss of a pregnancy; adding 'of her baby' is redundant.
Usage miscarriage of justice
“After marriage and the heartbreak of repeated miscarriages, Trawally returned to the Kanyeleng tradition she had grown up watching.”
“Following her own miscarriage, Flynn said she had "very vivid memories" of attending appointments at the Regional Fertility Clinic.”
From mis- + carriage.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.