has anyone ever heard of this? please read

Ok so this may sound weird. But I honestly think my husbands Y sperm are weaker than his X. I honestly feel like the two losses we've had were boys. Something we desperately want as we have 4 girls. Which those pregnancies had no issues. Is that a stretch or could I be onto something? First loss was at 6 weeks and then second was at 8 weeks. I don't even know where I begin.