babies and radiation

at noon today, i got an email from one of my staff that she's pregnant.
ok so the timing is a little sudden (i went to her wedding 1.5 month back!) but thats not even what shocks me.

apparently everyone else already know of her pregnancy because she was decked out in this little anti-radiation frock here that all mum-to-bes have to wear when they work around computers. its so powerful that a mobile phone under the frock would not work! i did a quick poll around the expat community in the office. no one have heard of this outside of China. did china invent this to protect their precious one child per family? hmm, if this is indeed necessary, i wonder how babies turn out in other countries.