Definition of Transmission, perinatal

Transmission, perinatal: Transmission of a disease-causing agent (a pathogen) from mother to baby during the perinatal period, the period immediately before and after birth. The perinatal period is defined in diverse ways. Depending on the definition, it starts at the 20th to 28th week of gestation and ends 1 to 4 weeks after birth. The perinatally transmitted pathogen might, for example, be HIV (the human immunodeficiency virus). Transmission might occur across the placenta or in the breast milk. Also called vertical transmission.

Last Editorial Review: 6/14/2012

Stages of Pregnancy Pictures Slideshow: See the 1st, 2nd and 3rd Trimesters of Mom & Baby
Search MedTerms:

Back to MedTerms online medical dictionary A-Z List
Pill Identifier Tool

Need help identifying pills and medications?
Use the pill finder tool on RxList.