i have one due June 27 and nothing at all is showing. i am beginning to think she is not bred. But Rose is right. A lot of times you can't tell until the last 2-3 weeks. Instead of an X-Ray, consider getting an Ultrasound. they do them at 29 days and altho it can be wrong about the number, it does tell you if she is pregnant or not. I have another girl that is due July 1 and I already am hearing heartbeats altho very faint.