mis ‧ car ‧ riage /ˌmɪsˈkærɪdʒ, ˈmɪskærɪdʒ/ BrE AmE noun [uncountable and countable]
if a woman who is going to have a baby has a miscarriage, she gives birth before the baby is properly formed and it dies ⇨ abortion , stillbirth :
She had two miscarriages before she had her first child.
One in five pregnancies ends in miscarriage.