perinatal period
Medical term referring to the period around childbirth, typically from the 22nd week of pregnancy to the first week after birth.
Advances in perinatal care have improved the survival rate of premature infants.
Refers specifically to the period after childbirth, while 周産期 includes the late prenatal and early postnatal phases.
Compound of 周 (around) + 産 (birth) + 期 (period), directly translating to 'perinatal period'. The term is a modern medical coinage.