Fertility reflects the health of the whole person — not just the reproductive organs but sleep, stress, nutrition, weight, thyroid function, and emotional wellbeing all play measurable roles. Both partners' health matters in conception, a fact that traditional medicine in many cultures understood intuitively and that reproductive science has now confirmed in detail. Whether conception is pursued naturally, medically, or through assisted means, the preparation of both bodies is the most foundational work.
Each step builds on the last.