Smart Stork claim to be able to help couples select the gender of their future child:
Our success rate in gender selection? Is still over 95%!
Their technique relies of biorhythms:
Smart Storks unique gender selection program, is based primarily on a womans biorhythm cycle and the alternating pH of acidic and alkaline fractions within her reproductive tract, these fluctuations directly affect the gender baby that can be conceived at the time of ovulation. The biorhythm theory is a theory based on the fact that every person, from the moment of birth, is ruled by their biorhythms or circadian rhythms. It rules the balance of our sleep/awake body clock and is the basis of our hormone secretions.
Our research focused on the impact of the women’s biorhythm cycles and her hormone production, the alternating pH within the follicular fluid and how that was a major factor in determining the baby’s gender at the time of ovulation.
The idea that a baby's gender is determined at ovulation, rather than conception, is a new one to me.
Their claims are (allegedly) supported by dozens of references.
Can techniques such as these be used with 95% reliability to select the gender of a yet-to-be-conceived child?