Embryonic cardiac activity is not detected

Definition & context

Embryonic cardiac activity absent between 6 weeks 0 days and 6 weeks 3 days can be indeterminate. Cardiac activity is expected by transvaginal scan in most embryos by ~6+0–6+3 depending on dating and scan quality, but absence in this narrow window — especially when CRL is below threshold (less than 7 mm) is often inconclusive. Management depends on CRL, technique (TVS preferred), and correlation with clinical/biochemical data. This tool helps interpret findings and suggests appropriate follow-up.

Images (example)

Ultrasound report - example line

Example: "Single intrauterine embryo with CRL 5.8 mm. Cardiac activity not detected on high-quality transvaginal scan. Given CRL less than 7 mm and gestational age 6w+2d this is indeterminate — recommend repeat transvaginal scan in 7–10 days and correlation with serial quantitative β-hCG."

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LMP

LMP not known

Scan date

CGA (weeks / days) — optional (overrides LMP)

Enter CGA to override LMP-derived GA.

CRL (mm) — if embryo seen

Observed structures / findings

Yolk sac seen Embryo / CRL seen Cardiac activity detected

Tick if structure/activity is visualized (TVS preferred). Leave 'Cardiac activity' unchecked to indicate absent cardiac activity.

Embryonic cardiac activity — assessment

Guidance for absent cardiac activity at 6w0d–6w3d

Ready

Console (errors / logs):

Related cases

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Embryonic Cardiac Activity Not Detected — Sonography — Quiz

भ्रूण की हृदय गति नहीं पाई गई — सोनोग्राफी — क्विज़

10 MCQs — choose the best answer (A–D)

10 बहु-विकल्पीय प्रश्न — सर्वोत्तम उत्तर चुनें (A–D)

Created: Embryonic Cardiac Activity Not Detected MCQ — bilingual (EN/HI)