The<unk>  is a child conception idea that is reputed to help determine a baby's sex. It was developed by Landrum B.<unk>  in the 1960s and was publicized in the book How to Choose the Sex of Your Baby, coauthored by<unk>  and David Rorvik. The book was first published in 1971 and has been in print in various editions ever since. By following the various methods outlined in the book, it is proposed that a couple can affect the probability of having a boy or a girl.
Shettles method
Papworth method
Tessys method
CHIVA method
NDR Method
BaleDoneen Method
Kick chart
Mole map 