DR NAJEEB LAYYOUS, WWW.LAYYOUS.COM / SCIENCE PHOTO LIBRARY DR NAJEEB LAYYOUS, WWW.LAYYOUS.COM / SCIENCE PHOTO LIBRARY
Ultrasound scans of a 12-week-old foetus. At this stage the foetus measures around 5 centimetres in length. At around this time, the brain significantly increases in mass and becomes structurally developed. Birth occurs at around 38-40 weeks. Ultrasound scanning uses the reflected echoes of high-frequency sound waves to image an unborn baby. This safe, non-invasive method is used routinely in pregnancy to assess the growth and health of the developing foetus, and detect any abnormalities.
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