单词oestrous cycle
网络: 发情周期；动情周期
Change of Contents of Progesterone and Oestradiol in the Milk of Chinese Holstein Cow During Oestrous Cycle
中国荷斯坦牛发情周期中孕酮、雌二醇含量的变化规律
Change of Reproductive Hormones at Oestrous Cycle Stage in Rat
大鼠发情周期中主要生殖激素的变化