ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Pregnancy check-up. General practice (GP) doctor measures the abdomen of a pregnant woman to estimate the size and growth of the developing foetus. Stretch marks are visible as thin red lines on her abdomen. These are caused by thinning and loss of elasticity in the lower layer of the skin, or dermis, as the abdomen swells.
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