The engineering behind reproductive cloning

Reproductive cloning doesn't require the use of egg cells, just normal somatic skin cells will suffice. This is somewhat amazing in itself; but what is also amazing, and may be taken for granted by many, is the technology behind the equipment used to perform the delicate transfer of cells to oocytes. It is common to show the transfer on screens, where the glass equipment used can clearly be seen. Reference ASME
One must not forget the human oocyte is only about 100 micrometres in diameter, and requires extremely delicate positioning by micromanipulators. These must be precision engineered to achieve reliability in operation.