Perinatal period is defined as -
Perinatal period is defined as from 28 week of gestation to one week after bih. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 519
From 20 week of gestation to bih
From 28 week of gestation to bih
From 28 week of gestation to one week after bih
From bih to one month after bih
obstetrics,pediatrics and geriatrics