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。
Methods The method of cervical mucus crystallization was used to examine estrous and estrus cycle of mice exposed to chronic different As2O3 drinking water. 方法采用宫颈黏液结晶法对不同浓度慢性砷暴露小鼠动情周期和动情期进行检查。
The bitch's cycle is divided into four periods. 母犬的发情周期被分为一下四个阶段。
