Whether you get a baby boy or baby girl depends on one simple fact. The sperm, and not the ovum, carries the genetic material called chromosome X or chromosome Y that determine the sex of the baby. The ovum always carries the X chromosome. When the sperm carrying a Y chromosome unites with the ovum, a fertilized ovum with a XY chromosome combination is produced and we get a baby boy. On the other hand, when the sperm carrying an X chromosome unites with the ovum from the female, a fertilized ovum with an XX combination is produced and we get a baby girl. But, it was discovered that nature is a little more complex in gender selection.

In 1961, scientists had shown that sperms containing the X chromosome were attracted to a positive charge while sperms containing the Y chromosome were attracted to a negative charge. Later a French cellular biologist, Patrick Schoun's research led to the discovery of a charge on the ovum membrane. The charge on the ovum membrane was not fixed but alternated from positive to neutral and to a negative charge in a cycle. This was called the polarity cycle of the ovum membrane. This polarity was found to be predictable but totally separate from the menstrual cycle.

The polarity cycle which unknown to most of us, was there in addition to the ovulation/menstrual cycle.

When the ovum membrane is neutral, sperms carrying either the X or Y chromosome can unite with the ovum and fertilise it. During this period, the chances of getting a baby boy or baby girl are 50:50.

The premise behind this finding is that gender is influenced by what scientists call "ionic factors" which generate the charge on the ovum membrane and on the sperms. The ovum membrane's alternating polarity is nature's way of selecting sperm with different gender determining chromosomes. So with more knowledge, sex determination of the baby is less a game of chance. You can flow with nature's way to help you choose a baby boy or a baby girl.