孕妇经常会因为荷尔蒙变化而情绪波动。

Pregnant women often have mood swings due to ___hormonal changes.

她最近总是因为小事就哭，医生说这是青春期荷尔蒙变化引起的。

She cries over small things lately, which the doctor says is due to ___hormonal changes during puberty.