Is my writing for this letter correct? I mean academy and grammar. (you can edit and add any sentence) I hope you will help me in drafting this letter.

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Dear sir / madam,

I want to inform you that my wife is pregnant and her doctor in the Kingdom of Saudi Arabia advised her that the X-ray machine is harmful of the health of the fetus. I ask and hope that you do not expose me to any device that harms the health of the fetus. I really ask you to understand my case and appreciate my situation in this case. I wrote this letter for you to explain to you what I want, because my English is weak, and I am afraid that I cannot communicate the information to you as required.

I hope you will help me by avoiding anything that the fetus may see, and I appreciate that

Thank you very much.

Sam