Read Callen`s Ultrasonography in Obstetrics and Gynecology, 6th ed.
Ch 6: Fetal biometry and Growth
Ch 7: Ultrasound Evaluation in multiple gestations
Ch 8: Ultrasound Evaluation of Normal Fetal Anatomy
Ch 19: Ultrasound Evaluation of Placenta, Membranes and Umbilical Cord

Rad Primer:
Basic OB

Read Callen`s Ultrasonography in Obstetrics and Gynecology, 6th ed.
Ch 20: Amniotic fluid volume in fetal health and disease
Ch 21; Antepartum Fetal Surveillance and the Role of Ultrasound
Ch 22: The role of Doppler sonography in obstetrics.
Ch 38: Artifacts, Pitfalls, and Normal variants

Rad Primer:
Intermediate OB

Read Ultrasound: The Requisites, 3rd ed.
Ch 12: The obstetric ultrasound examination: Guidelines
Ch 15: Fetal Central Nervous System, Face and Neck
Ch 16: Fetal thorax
Ch 17: The fetal gastrointestinal tract
Ch 18: Fetal genitourinary tract

Rad Primer:
Intermediate OB