First Trimester

Ultrasound scanning guidelines

First Trimester transabdominal or transvaginal scanning maybe used to investigate an early pregnancy Assess: Uterus myometrium / cervix Ovaries and adnexal regions Pouch of Douglas Gestational sac location / size / shape Identify embryo / fetal pole / number Yolk sac / amnion Fetal cardiac activity Fetal morphology Cranium Heart / stomach Bladder Cord insertion presence of limbs, hands and feet Documentation for transabdominal scanning: Long view of the uterus right / midline / Left Trans view of uterus inferior / mid / fundus Ovarian measurements long / transverse Gestational sac measurements long and transverse for Mean Sac Diameter (MSD) Crown Rump Length (CRL) measurements of fetal pole / fetus Document fetal heart movement if present - M-mode and dynamic clipstore Fetal Morphology views (>11 weeks) Coronal head and body Trans cord insertion Stomach Bladder Documentation for transvaginal scanning: Long views of uterus right / midline / left Long view of cervix / Pouch of Douglas Coronal view cervix Coronal view uterus inferior / mid / fundus Ovarian measurements , long and coronal Gestational sac measurements long / transverse for MSD CRL measurements of fetal pole / fetus Document fetal heart movement if present - M-mode and dynamic clipstore Fetal Morphology views (>11 weeks) Coronal head and body Trans cord insertion Stomach Bladder

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