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.

在实验室用丙溶解，并用紫外线分测定枚NRID内剩余量，计算枚NRID内释放量，模拟分析NRID主成分在山羊体内的释放规律。