n.性腺；生殖腺
At this stage the gonad is indifferent. 此时，不能辨认性别而称之为未分化性腺。
The effect of cadmium on the female gonad was shown to have the extrous cycle delayed and the proportion of atresic follicle increased. 镉的雌性性腺生殖毒性可表现为动情周期的明显延长，卵巢细胞生长发育过程的明显障碍。
This doctor is experienced in treating gonad diseases. 这位医生对治疗生殖腺疾病非常有经验。
n.促性腺激素
