SIDNEY MOULDS / SCIENCE PHOTO LIBRARY SIDNEY MOULDS / SCIENCE PHOTO LIBRARY
Male sex hormone. Polarised light micrograph of crystals of dehydroepiandrosterone, also known as DHA. This is one of the naturally-occurring androgens, a class of hormones associated with the development of male reproductive organs and secondary sex characteristics. DHA is an intermediate stage in the biosynthesis of testosterone from pregnenolone. Magnification: x6 at 35mm size.
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