A new study from Maastricht University claims that women who take more than a year to conceive are more likely to produce sons: 58% vs. 51%. For every additional year of “natural” conception attempts, there is an almost 4% higher probability of having a boy. Apparently, women who struggle to conceive are more likely to have viscous cervical mucus. Sperm with Y chromosomes swim faster than those with X chromosomes, therefore moving through the thicker mucus more easily. The study did not, as far as I can tell, look at whether AI or IVF had any effects on cervical mucus or children’s genders.
No 100% guarantees in this game, though, regardless of how you do it.
