| 摘要 |
An oocyte needle has a metal shaft (1) with a hub (3) attached at its rear end (2). The shaft (1) has a main rear portion 6 about 300mm long with a diameter of about 17g. A shorter portion 7 about 30mm long at the forward end of the shaft (1) is made by cold drawing or rolling with a smaller diameter of between about 21g and 19g. The small diameter forward end (7) facilitates extraction of oocytes whereas the thicker rear portion (6) ensures that the needle shaft (1) has sufficient overall rigidity to enable it to be manipulated effectively. |
