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Neonate

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At birth the vulva is still under the influence of maternal hormones that cross the placenta and persist for about 4 weeks. The vagina will be lined with a stratified squamous epithelium rich in glycogen as a direct effect of maternal oestrogen, and lactobacilli will be part of the normal flora. There will often be an obvious vaginal discharge, which can be bloodstained as the result of the endometrium breaking down as oestrogen levels begin to fall.

Ridley's The Vulva

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