The first theory that I tested using the charts on Fertility Friend is whether BD on the day of ovulation results in more boys. After looking at another 100 charts (bringing the total number of charts I've analyzed to 500, 250 boy charts and 250 girl charts), the answer is still the same as previously: technically yes, it favors boys, but the results are pretty much the same as chance.
A majority of all charts - for boys and girls - had BD on the day of ovulation.
- 151 boy charts out of 250 (60.4% of all boy charts had BD on ovulation)
- 140 girl charts out of 250 (56% of all girl charts had BD on ovulation)
This means that out of 291 total charts (boy and girl) with BD on the day of ovulation, boys resulted 51.9% of the time (151/291 charts) and girls resulted 48.1% of the time (140/291 charts). While this technically results in more boys, the findings are essentially the same as chance (since the natural birth rate is 51% boys, and 49% girls). It indicates that simply BD on the day of ovulation does not sway.
One thing that does sway a little bit is the kind of cm present on the day of ovulation. If there is ewcm (eggwhite OR watery cm) on the day of ovulation, boys are more likely to result.
- 110 boy charts out of 201 charts w/ewcm on ovulation (54.7%)
- 91 girl charts out of 201 charts w/ewcm on ovulation (45.3%)
If there is NOT ewcm present (if it is sticky or creamy, or there is no cm present), girls are more likely to result.
- 41 boy charts out of 90 charts with NO ewcm on ovulation (45.6%)
- 49 girl charts out of 90 charts with NO ewcm on ovulation (54.4%)
This finding has consistently surprised me. It seemed logical that, since at ovulation ph is typically at its highest and cm is usually most plentiful, BD on that day would result in more boys. But that is not the case. Simply BD on ovulation apparently does not sway; the results are essentially the same as chance.
Now there ARE some patterns with BD on ovulation that do favor boys, and we will get to those shortly. But BD on ovulation in general doesn't sway.