Yes she is slightly overweight, it is after she got overweight she has been having all these problems
she might have PCOS..is she overweight at all?
Your wife may need to go and see a Reproductive Endocrinologist...
It sounds as though she may have some hormonal issues affecting her greatly, and they will be able to pinpoint what's going on, and also what you'll need to do to get pregnant. Don't forget to pray!
Good luck.