When China had a famine there was a huge drop in boys born. The reason for this is because during stressful times girls are preferred because they are guaranteed to reproduce and pass on your progeny. Billionaires for example have lots of sons compared to daughters because they live very stress-free lives of luxury. So here's a guide on how to increase your chances of a son
1. No stress
2. No exercise/gym atleast months prior to conception
3. No underwear
4. Being around men more and having a good time
5. Cold exposure to balls
6. Eat clean and avoid all toxins
7. Minimal bathing, or avoid using hot water
7. Nut inside her deeper
Male swimmers are faster but have lower stamina
Female swimmers are slower but have high stamina
8. Make sure the woman eats a lot. Higher calorie surplus increases chances for boys.
9. No exogenous testosterone
10. No drugs
11. Have sex during ovulation
Male fetuses in general require more nutrients and are more fragile due Y-chromosome instability, but have much more potential than girls. This is why many say 2 girls = 1 boy. You have to optimize everything.
If you want to fix long term damage do all of this for atleast 3-6 months and manifest the nut so the seed is male.
You should be having 20 kids with your wife, by the way.