The release patterns of norgestrel in NRID in vivo were simulated after the norgestrel in NRID was dissolved by acetone and the rest of norgestre was determined by Ultraviolet Ray Spectrometer.

在室用丙酮溶解，并用紫外线分光光度仪测定枚NRID内炔诺酮剩余，计算枚NRID内炔诺酮释放，分析NRID主成分炔诺酮在山羊体内的释放规律。