<s>[INST] dr.amir : i m A RADIOLOGLOGIST doctor 37 years old ,my wife 23 years old. i m heavy smoker. i got married 6 month ago a despite nonstop tries  ,my wife cann t get pregnant.  personally i think that it is due to excess of radiation -BECAUSE once i was exposed to direct radiation of small pelvis for some 2 minutes. and second thing is that i examined many patients  without using the lab-coat/which protects gonads and thyroid against secondary radiation/.  i decided to go for analysis of sperm /i m too scared because i can predict the results/what is your oponion? [/INST] HelloThanks for query. You are Radiologist by profession married since six months and unable to impregnate your wife. There are two possible reasons for not conceiving 1) Excessive smoking 2) Frequent exposure to radiation at your work place You need to use marker to estimate the amount of radiation exposure that you are subjected to every day. Doing a semen analysis will help to know the details about sperm count.sperm motility and other parameters of semen and reasons for not conceiving to take necessary treatment if required. Chat Doctor.  </s>