Microsort is a sperm-selection method in which dyed sperm cells are illuminated with a laser using a process known as fluorescence.
The theory behind this method is that X chromosome-bearing sperm cells are larger, thus glowing brighter than their Y chromosome counterparts. The sperm is separated by chromosome and the desired gender only is implanted through IUI.
This method is less effective than the Silverman Method, is not approved by the FDA and is not available in the USA.
Shettles is a natural method of gender selection premised on the relative strength of different chromosome-bearing sperm. This method postulates that X chromosome-bearing sperm is hardier, so sexual intercourse 2-4 days before ovulation is likely to produce a female baby. Y chromosome-bearing sperm is faster, so sexual intercourse as close as possible to ovulation is recommended for conceiving a male baby. This method’s effectiveness has not been validated in any scientific trials.
Based upon a misguided theory about basal body temperature fluctuation, the Whelan method suggests sexual intercourse 4-6 days before ovulation to conceive a boy, and three days before ovulation to conceive a girl.
Similar to the Shettles Method, the Whelan Method is completely unsubstantiated by any scientific data.
The Jonas Method incorrectly proposes that the likelihood of conceiving and gender are influenced by changes to a mother’s body brought about by the lunar cycle. The Jonas “theory” suggests that conceiving chances are highest on a woman’s “lunar conception date,” as determined by the date, time and place of her birth.
As with Shettles and Whelan, these claims and their effectiveness are completely unsubstantiated by any scientific data.