noun
perinatal period
Medical term referring to the period around childbirth, typically from the 22nd week of pregnancy to the first week after birth.
周産期医療の進歩により、早産児の生存率が向上した。
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.