Ovarian follicles Light micrograph of a primary lower left and secondary upper right ovarian follicles containing oocytes ova at their centres At birth there are tens of thousands of primordial follicles the precursors to primary follicles present in the ovaries Once sexual maturity is reached primordial follicles are triggered to start developing into primary follicles every menstrual cycle In the secondary follicle stage the chromosomecontaining oocyte enlarges and is surrounded by follicular cells dark brown dots One secondary follicle per month becomes a Graafian follicle releasing its egg at ovulation

Animal Art

Keep your furry and feathery friends close, whether they are a galloping stallion or a dog taking a selfie. Our gallery is here to turn empty walls into a cute and quirky display of animal art.

Psst! Did you know chimpanzees, elephants, and dolphins are some of the most intelligent mammals out there?