Polarised light micrograph of crystals of progesterone,a female sex hormone which is secreted monthly in the ovary and which stimulates development of the uterus to receive a fertilised egg and to nourish the embryo. In pregnancy,progesterone prevents menstruation and the release of more eggs; this characteristic of progesterone is the basis of the contraceptive pill: Magnification x40 at 35 mm | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Parker, David |
Bildgröße: | 3543 px × 5157 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |