Ovarian cycle,computer artwork. Once sexual maturity is reached up to 20 oocytes start developing into eggs (ovums) every menstrual cycle. Only one will reach full maturity as a Graafian follicle (centre left) and release its egg at ovulation (left). The follicle then develops into a corpus luteum (yellow),which secretes progesterone to build up the lining of the uterus,ready for a fertilised egg. If there is no fertilised egg after 12 days it stops secreting and degenerates into a corpus albicans (green) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Elam, Gunilla |
Taille de l’image : | 3511 px × 2542 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |