A woman 's immune system is compromised during pregnancy .

女性的免疫系统在怀孕期间易受损害。

Pregnancy causes many changes both physically and psychologically .

妊娠常引起孕妇身体和心理上的许多变化。

Crh levels are also known to soar during pregnancy .

在孕期，crh水平也是公认会飙升的。

Six months into a perfect pregnancy , she miscarried .

妊孕六个月，她又流产了。

Hormonal changes during pregnancy may worsen the symptoms .

怀孕期间的生理变化可能使病状加重。