According to Shettles, " boy insemination should occur as close as possible to the moment of ovulation so that the faster, Y-sperm arrive first and achieve conception. When seeking a girl insemination the couple should seek to have sex 2? to 3 days before ovulation."
Accordingly, if an OPK is used and followed, it seems a boy would most often be born to those couples using them. That is certainly the case for us; we had a boy.
If you used an OPK (and followed it), did this prove to be true for you?