ตัวเช็กอัตราส่วน HC/AC

What is the HC/AC ratio?

The baby's head circumference divided by the abdominal circumference, both from the same scan. It shows how the head and tummy compare.

What is a typical HC/AC ratio at my week?

It falls through pregnancy: about 1.19 at 20 weeks, 1.11 at 28 weeks, 1.03 at 36 weeks and just under 1 at 40 weeks. Enter your week to see the typical range.

What does a high HC/AC ratio mean?

The head measures large compared with the tummy. Sonographers look at it together with the estimated weight, the fluid and the blood flow, and often plan a follow-up scan.

What does a low HC/AC ratio mean?

The tummy measures large compared with the head. On its own this often just means a well-grown tummy.

Why does my result differ from my report?

Clinics use different charts, and a few millimeters change the ratio. Your report's own chart is the one your team goes by.

Is my data saved?

No. Everything is worked out in your browser and nothing is stored or sent.