Artificial insemination - boy or girl?

I have this theory that when there isn’t male ejaculation inside and you use an artificial method like syringe/turkey baster method to conceive, you’re more likely to result in girl pregnancies. Reason being that Y-bearing male-producing sperm have a speed advantage over X-bearing female-producing sperm, more often winning the race to fertilize the egg and resulting in more male conceptions. But in a scenario where you don’t have the speed or force of ejaculation, sperm travels slower and more girls are the result.

Just a theory - feel free to weigh in. We tried for a long time and ended up becoming pregnant with a baby which was a girl. Second baby on the way now and gender is unknown but we think it’s also a girl cause of exact same symptoms.