In addition to body fat, the vernix – the greasy coating that covers the skin – provides a further method of temperature control. Body fat has now accumulated sufficiently that the lanugo – the hair that covered the entire body – is no longer needed to help control body temperature and is usually completely shed by this stage. The amount of amniotic fluid within the amniotic sac is beginning to decrease to accommodate the ever-growing fetus. A steady weight gain will continue now, until birth although growing in terms of length tends to level out around this time. By this stage of pregnancy, the fetus weighs approximately 2.5kg and measures around 46cm in length from crown to heel.
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