This is the 14703rd most frequent Russian word.
перинатального
"Perinatal" – relating to the time immediately before and after birth.
Here, "перинатального" describes "здоровья" (health) in the context of the period around childbirth.
Перинатального здоровья важно уделять внимание во время беременности.
Paying attention to perinatal health is important during pregnancy.
"Перинатального" modifies "развития" (development), indicating its focus on the timeframe associated with childbirth.
В клинике проводятся исследования перинатального развития младенцев.
The clinic conducts studies on the perinatal development of infants.
In this sentence, "перинатального" qualifies "ухода" (care), emphasizing activities or care related to the perinatal period.