If you do the BD BEFORE ovulation and conceive, will the baby be a boy or a girl?

Supposedly, the sperm that carry x's live longer, so if you bd before ovulation, you should have a girl. The sperm that carry y's apparently swim faster, so if it's right at or after ovulation, it will be a boy. However, I know it was before I ovulated that we conceived my son, my hubby was out of town when I ovulated, so it doesn't always work.