A stillbirth is the death or loss of a baby before or during delivery. Both miscarriage and stillbirth describe pregnancy loss, but they differ according to when the loss occurs.
A stillbirth is the death of a baby in the womb after week 20 of the mother's pregnancy. The reasons go unexplained for 1/3 of cases. The other 2/3 may be caused by problems with the placenta or umbilical cord, high blood pressure, infections, birth defects, or poor lifestyle choices.