英语语法分析

For the first 21 days after menstruation, estrogen hormones create a feeling of well-being and give generally happy feelings.

大多数绝经前的女性在月经之后的21天里，体内的雌激素会产生一种健康幸福感。

The team found that estrogen and the chemicals caused the mammospheres to increase in numbers and size.

研究小组发现雌激素和化学药品能引起乳腺球数量增加和体积增大。

Do you know what estrogen is?

你知道雌性激素吗？