I got pregnant on my third round. It was funny, I was very down leading up to it, but once I got on it I was able to maintain a very positive attitude. I went in expecting to NOT get pregnant immediately.
These are U.S. numbers:
My first round of clomid my progesterone went up to 10. The doctor increased the dosage to 100 mg.
Second round of clomid my progesterone was 28, so we kept it at 100. In all honesty, I think for the second round it was poor timing on mine and my hubby's part.
Third round progesterone was 74, and I was pregnant by then. We had been traveling overseas, and I had not adjusted to the time shift. I was laying in bed, wide awake, and decided to check out my CM. I woke my poor hubby out of a dead sleep to have sex, I just KNEW I was ovulating.
Of course, results can vary from woman to woman. My supervisor's wife took clomid, and it did not work for her. She ended up getting the trigger shot, and got pregnant immediately. Just stay positive.
With all that modern medicine can do for us these days, the chances are in YOUR favor.