Mother-to-infant transmission的用法和樣例：
例句
- However, the major mode of transmission is infant exposure to maternal blood, which occurs throughout labor and delivery.
然而母嬰傳播途徑最主要的是當胎兒期間和分娩期間嬰兒暴露在母血的時候。 - Lamivudine therapy might not prevent perinatal transmission of HBV infection in every newborn.
說明拉米夫定治療不能阻斷所有新生兒圍產期的母嬰傳播。
