Unlike eggs, which are finite, sperm is produced continuously, so habit changes show a measurable effect in about 90 days. The book lists 10 habits for him: quit smoking and vaping, cut back on alcohol, avoid scrotal heat, exercise without overdoing it, eat well, take the male supplements, sleep well, keep a healthy weight, reduce endocrine disruptors and keep the phone out of the front pocket.
Sperm are produced in the testicles in cycles of roughly 72 to 90 days. That means the quality of today's sperm reflects his habits over the last three months, and everything he does today affects the sperm of three months from now. Cigarettes, alcohol, excessive heat, anabolic steroids and poor sleep all affect the production still to come.
The bigger picture: global sperm concentration has dropped 50 to 60% over the last 4 decades, according to meta-analyses published in 2017 and updated in 2022. The causes: exposure to endocrine-disrupting chemicals, a sedentary lifestyle, obesity, heat (laptops on the lap, hot baths, saunas), smoking and alcohol.
Of the 10 habits, the book singles out heat as underestimated. A laptop on the lap, a long hot bath, a sauna session or tight underwear look harmless, but they affect testicular temperature and sperm production.
The book's plan orders his semen analysis in the first month. If it comes back below the reference, it is repeated in 4 to 12 weeks while the habits change, and many men with a bad first test come back normal after 3 to 6 months of adjustments.
The 10 habits come from Chapter 25 of Map to the Positive, "His fertility: what he needs to do", in Station III (Optimization). The supplement stack is detailed in Chapter 22 and the Mediterranean diet in Chapter 21. The station closes with an integrated 90-day plan, timed to the 72 to 90 days a full batch of sperm takes: he cuts back on alcohol and quits tobacco in the first month and starts the complete male stack in the second.
Take 30 days. If it does not give you more clarity than everything you have read for free so far, ask for a refund and you get every cent back. We cannot promise you a pregnancy. We can promise you will not be guessing.
References: Levine H et al. Temporal trends in sperm count: a systematic review and meta-regression analysis. Human Reproduction Update, 2017 (updated 2022).