1) Stillbirth refers to the death of a fetus after 22 weeks of gestation or weighing at least 500g, as defined by the WHO. It can occur during delivery (intrapartum) or before delivery (antepartum).
2) Common causes of stillbirth include complications of pregnancy/delivery, fetal growth issues, congenital anomalies, maternal infections, diabetes, hypertension, and unexplained/idiopathic cases.
3) Diagnosis involves assessing the mother's medical history, performing a physical exam to check for fetal movement/heart rate, and conducting imaging like ultrasound to check for fetal abnormalities. Additional tests may include blood tests, amniocentesis, and autopsy.