Female sex hormone. Polarised light micrograph of crystals of beta-Estradiol. This is the most potent of the six naturally-occurring estrogens,the class of hormones associated with the development of female reproductive structures and secondary sex characteristics. Beta-Estradiol is secreted by the ovaries,and is the major controlling hormone in the regulation of the menstrual cycle. It is formed by enzyme-catalysed synthesis from pregnenolone. Magnification: x12 at 35mm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Moulds, Sidney |
Taille de l’image : | 2480 px × 3759 px |
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