If you look closely you can see a horse embryo in this test tube. They are of course still very small in the beginning and it is not at all recognizable with the naked eye what they become. Did you know that it slowly starts to take recognizable shapes between day 15 and day 21? Then the brain, heart and limbs form. It is still only as small as a pea! Have you ever seen a horse embryo? -- Als je goed kijkt zie je in dit reageerbuisje een embryo van een paard . Ze zijn in het begin natuurlijk nog