neonatal death
Medical term for the death of a newborn within the first 28 days of life.
The main causes of neonatal death are preterm birth and congenital anomalies.
乳児死亡 refers to infant death within the first year, while 新生児死亡 is limited to the first 28 days.
周産期死亡 includes stillbirths and deaths within the first week, a broader category than 新生児死亡.
Compound of 新生児 (newborn) and 死亡 (death).