Tricare not covering

I am so confused. I spoke with a lady I worked with and she had ivf in Cali covered by tricare. I think she paid like $1000. I am currently under the care of a fertility doc and he said I'm good for everything except Seamen analysis/wash and ivf. I do my first round of Femara, trigger shot and then iui in February. It's $140 each iui attempt to pay for the semen wash. Don't get me wrong, I know that is incredibly incredibly cheap compared to if I had to pay myself. I guess I just don't understand how the same insurance company is covering different things for different women in service.