hypophysectomy的复数形式怎么写

Hypophysectomy before implantation terminates pregnancy and after the 44 th day of gestation causes abortion in goat.山羊与附植前切除下立脑可使妊娠终止,而在妊娠44天后切除则造成流产....

hypophysectomy的音标：hypophysectomy的英式发音音标为：[haɪˌpɒfɪ'sektəmɪ]hypophysectomy的美式发音音标为：[haɪˌpɒfə'sektəmɪ]...

n.垂体切除术...