Hello madam,my self Avinash Gupta,I'm a software engineer in TCS hyderabad,my problem is i had relation with my wife 3 times.how can i know that my wife is going to pregnant or not.Because i already check through Pregnency test kit,the result was negetive.But the Period problem is starting.her last period date was 07.01.2011.but today is 09.02.2011, and still their is no sign of period.is it the indication of pregnency?.so please tell me how i check pregnency.