Explanation:
asthma
Chronic Bronchitis
Emphysema
Emphysena is a serious respiratory disease, which in other form of COPD. It could be caused by smoking. The cause are hard breathing from the lungs
In this specific situation Catherine is pregnant and is preparing for childbirth.
So she would need someone to assist her in child bearing. This person would be a mid wife.
The other answer choices deal with diseases of the reproductive system. And that is not what we need.
Good Luck!
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The answer to this one should be cancer