Mammalian ova

The discovery of the mammalian ova involved observing a smaller structure within a dog's ovarian follicles, altering previously held views on mammalian development. It highlighted that mammalian embryological processes were not fundamentally different from other animals.
 Karl Ernst von Baer Estonia 1827 Mammalian ova

The discovery of the mammalian ova involved observing a smaller structure within a dog's ovarian follicles, altering previously held views on mammalian development. It highlighted that mammalian embryological processes were not fundamentally different from other animals.