Objective To make measurement of the estradiol (E2) and progesterone (P) level in blood serum of Mongolian gerbils, and to compare with those in NIH mice and SD rats.

• 摘要目的测定长爪沙鼠、NIH小鼠和SD大鼠的血清雌二醇(E2)和孕酮(P)水平，为研究长爪沙鼠的生殖和胚胎工程提供基础资料。