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Free Research-Backed Checklist

Optimize Your 90-Day Fertility Window

A free, evidence-based checklist covering the 10 factors with the strongest research links to conception success — for both partners.

Based on research fromFertility and SterilityHuman ReproductionReproductive BioMedicine OnlineJAMA
74 Days

Time for sperm to fully mature — what you do now affects fertility 2.5 months later

Amann, 2008

84%

Conception rate within 12 months for couples with optimized lifestyle factors

Gaskins et al., 2018

2x

Higher pregnancy rates in couples who timed intercourse to the fertile window

Wilcox et al., 1995

Fertility isn’t just about age. Modifiable factors explain a significant portion of conception outcomes.

The research is clear: sperm quality, ovarian environment, thyroid function, and lifestyle factors all impact time to pregnancy. Most of these are measurable — and many are improvable.

FREE · 8 Pages
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90-Day Fertility Optimization Checklist

10 evidence-based factors by impact level
Male & female optimization protocols
Cycle tracking fundamentals
When to seek specialist help
Evidence-based · Fully cited

Get the 90-Day Fertility Optimization Checklist

A free, research-backed guide covering the modifiable factors that affect conception — ranked by evidence strength and actionability.

Inside the checklist:

The 74-day sperm cycle and 90-day egg maturation timeline — why starting now matters

10 evidence-based factors ranked by impact on time to pregnancy

Key biomarkers to test: FSH, AMH, TSH, semen analysis — and what the numbers mean

Fertile window timing protocols backed by Wilcox et al. landmark studies

When to seek specialist help: age-based and duration-based thresholds

Topics Covered:

Sperm QualityOvarian ReserveCycle TrackingThyroid FunctionWeight & BMISupplementsTiming IntercourseWhen to Get Help

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Every Number in This Checklist Comes From Published Research

NEJM

Landmark study: only 6 days per cycle with non-zero conception probability — the fertile window

Wilcox et al., 1995 — PMID: 7477165

Human Reproduction

2-8% conception probability per cycle for women 35-39; highest odds with ovulatory timing

Dunson et al., 2004 — PMID: 14645172

Fertility and Sterility

WHO 6th edition semen analysis reference values: 39M total count, 42% motility minimum

WHO, 2021

Human Reproduction Update

Meta-analysis: scrotal temperature elevation (laptops, hot tubs) reduces sperm concentration

Durairajanayagam et al., 2015 — PMID: 25646367

JAMA

Subclinical hypothyroidism (TSH > 2.5) associated with reduced fecundability

Plowden et al., 2016 — PMID: 27002447

Reproductive BioMedicine Online

CoQ10 supplementation (600mg/day) improved ovarian response markers in poor responders

Xu et al., 2018 — PMID: 29605129

The Fertility Window Is Shorter Than You Think

Every cycle matters. This checklist gives you the evidence-based factors, the biomarkers to track, and the protocols that work — in under 10 minutes.

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