R.,
Have you gone through any genetic counseling to make sure that there isn't something going on much less something that could be resolved?
To answer your question though, YES!!
1) A cousin-in-law had a son, then 3 miscarriages I think it was, went to a high risk/fertility doctor and ended up with b/g twins!
2) My step SIL had 2 miscarriages, had a son, had several more miscarriages, then finally had her daughter.
3) A friend through a friend had a couple of miscarriages and lots of fertility issues just to have a son a few months ago!
4) I have a very good friend who has three boys now but sadly I can't tell you how many miscarriages she had in between.
I really think you need to explore genetic counseling though just to see what is going on and maybe it would solve whatever is happening. Have you also talked to your doctor about using a progesterone cream? I have heard of low levels not only making it hard to conceive but also causing miscarriages. I've heard it is suggested to use a progesterone cream for the first 9 weeks I think it is after getting pregnant but again, you would need to talk to your doctor or a homeopath because I believe the cream needs to be used a certain way and I don't know what that is. I know when you are NOT pregnant you are supposed to take a week off after 3 weeks but again, please talk to a doctor.
I wish you the best and hope we get news on here soon that you are successfully carrying your little bundle!