产前检查次数
frequency of prenatal examination
做第一次产前检查
having their first pre-natal check-up
产前超声检查
Prenatal ultrasonography
Prenatal ultasonography
Ultrosound exposure to pregnant women
未特指的孕产妇产前筛选检查的异常
Abnormal finding on antenatal screening of mother
飞行前检查系统
Pre-fly Examination System
婚前检查
Premarital examinations
premarital check-up
premartial examination
Pre-marriage physical examination
pre-marriage checkup extremely
检查前准备
Preparation before examination
绝缘电阻表的用前检查
Pre-use Checks of Insulation Resistance Meter
染色体异常胎儿出生前检查
Antenatal screening for chromosomal anomalies