This study intends to prospectively enroll high-risk pregnant women to establish a multicenter cohort. By combining maternal basic characteristics, medical history, early pregnancy ultrasound, and biological markers, we aim to construct a joint predictive model for MVM-FGR.
Pregnant women with gestational age of <14 weeks
Maternal age between 18 and 45 years old
Maternal age >40 years
Nulliparous, Maternal age >38 years
Presence of fetal genetic abnormalities or severe structural abnormalities in prenatal ultrasound or genetic testing.