The hottest Fertility Substack posts right now

And their main takeaways
Category
Top Health Politics Topics

Tough Love: I Want Kids. My Boyfriend Says He’s Not Ready.

Common Sense with Bari Weiss • 2837 implied HN points • 15 Mar 26
🎭️ Culture Fertility
  1. Asking a partner to freeze her eggs so he can delay commitment is a red flag that he’s avoiding responsibility and may be manipulative or unwilling to fully commit.
  2. Changing or vague reasons for delaying engagement, moving in, or having children are moving goalposts and suggest his timeline may never align with yours.
  3. Staying in a loving but stalled relationship risks losing the biological window to start a family, so leaving to find someone whose timeline matches yours can be an important act of self-respect.

✨🍼 Artificial intelligence faces a fertility test

Faster, Please! • 1096 implied HN points • 18 Mar 26
🕹 Technology Fertility
  1. Collective optimism drives fertility. When people feel the future is brighter, birth rates tend to rise, and that optimism can spread across countries through social connections.
  2. AI can push fertility either way. If AI clearly raises prosperity and security it may encourage more births, but if it fuels job fear and uncertainty it can depress fertility even before incomes change.
  3. Policy should focus on confidence, not just cash. Beyond subsidies and childcare, stable jobs, housing, safety nets, and credible public communication that reduce uncertainty are key to restoring people’s willingness to make long-term bets like having children.

Stop Trying to Make Heterosexuals into Lesbians

Richard Hanania's Newsletter • 5291 implied HN points • 09 Mar 26
🎭️ Culture Fertility
  1. Heterosexual attraction often depends on complementarity: men typically prioritize youth and physical attractiveness while women more often prioritize status, resources, or power.
  2. Pushing heterosexuals to adopt a lesbian-style model of romance that minimizes power differences and emphasizes compatibility only — and stigmatizing age gaps, workplace dating, or transactional aspects — can reduce pairing and harm family formation.
  3. We should be realistic and nonjudgmental about different adult relationship types, acknowledge how dating apps and changing social norms reshape mating markets, and avoid selectively condemning common transactional dynamics.

The Fertility Problem Is Getting Worse with Time

Richard Hanania's Newsletter • 3121 implied HN points • 09 Feb 26
🎭️ Culture Fertility
  1. Richer countries tend to have fewer children, and this effect has strengthened over time so that today many nations have much lower birth rates at the same income level than they did decades ago.
  2. New technologies and global cultural changes — from TV to the internet and smartphones — have made childrearing relatively less attractive and spread anti-family norms beyond what income alone explains.
  3. Culture and social pressure can still move fertility (the Georgian baptism example), but broad pro-natalist policies face steep headwinds and likely need wide public support or strong cultural interventions to work.

Nobody knows how to stop humanity from shrinking

Noahpinion • 26647 implied HN points • 22 Nov 24
🇺🇸 U.S. Politics Fertility
  1. Humanity faces a big problem with declining population and aging, which is not getting enough attention. As birth rates drop, we risk having fewer young people to support our growing older population.
  2. The U.S. now relies heavily on immigration to maintain its population. Many other parts of the world are experiencing the same low birth rate trends, making future immigration uncertain.
  3. Fertility rates are continuously declining globally, and no one knows how to stop this trend. A smaller, older population could threaten the quality of life and economic stability.
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Noah Smith Needs to (& Many Others Need to) Listen to Claudia Goldin & Eddie Cornelius: Treat Her Like a Lady to Raise the TFR

Brad DeLong's Grasping Reality • 415 implied HN points • 23 Jan 26
🎭️ Culture Fertility
  1. Falling birth rates are mainly a social problem tied to gender roles and cultural expectations, not just economics or technology.
  2. Big baby bonuses can raise fertility but would be prohibitively expensive and politically difficult, so cash-only solutions are unlikely to restore replacement-level births.
  3. A better approach is changing men’s behavior and social norms—encouraging supportive partners, de-emphasizing macho 'bro' status, and raising the pay and status of caregiving—so motherhood fits with women's economic choices.

Stop Telling Women When to Have a Baby

Common Sense with Bari Weiss • 222 implied HN points • 12 Feb 26
🎭️ Culture Fertility
  1. There isn’t one perfect age to have a baby; biology might point to an optimal window but social and personal circumstances mean timing is different for every woman.
  2. Women get nonstop, unsolicited advice about when to have kids from all parts of the political spectrum.
  3. Men don’t face the same pressure about timing, and some men cross lines by trying to dictate or control women’s reproductive choices, which can be inappropriate and paternalistic.

Fertility Goes Up When Men Win

Cremieux Recueil • 694 implied HN points • 21 Dec 25
🏥 Health Politics Fertility
  1. When men gain income or individually controlled money, households tend to have more children, while when women get the same transfers, completed fertility often falls—likely because shifts in who controls resources change household bargaining.
  2. This male-bias effect appears across many settings—reparations, lottery wins, resource booms, and sex-ratio shifts—and seems driven by higher male marriage rates and greater marital stability when men’s prospects improve.
  3. For fertility policy, that means who receives support matters: boosting men’s economic prospects or using child-contingent designs can raise births, but explicitly favoring men is politically unacceptable, so policies must instead shape incentives and bargaining in neutral, fair ways.

🛑🚼 The end of (demographic) history

Faster, Please! • 548 implied HN points • 14 Dec 25
🔬 Science Fertility
  1. The global fertility transition seems to have largely finished, so the classic story of steadily falling birth rates is no longer the clear master narrative.
  2. Even with that shift, the demographic future is uncertain — demographers don’t know exactly how birth rates, aging, and migration will evolve next.
  3. That uncertainty has big policy and economic implications, because different population paths lead to very different outcomes for growth, labor markets, and public finances.

Statistical Methods Links,12/07/2025

In My Tribe • 288 implied HN points • 07 Dec 25
🔬 Science Fertility
  1. Certain personality traits like being assertive and energetic can lead to higher earnings, while traits like being anxious or preferring routine work are linked to lower earnings.
  2. A small correlation in data, such as between social media use and depression, can significantly impact outcomes, but it's important to analyze data correctly and not rely solely on models.
  3. Current fertility rates among older Millennials appear similar to older generations, but the context matters; using outdated comparisons can be misleading, and true trends show a decline in fertility.

A Problem of Prophesy

David Friedman’s Substack • 260 implied HN points • 20 Dec 25
🔬 Science Fertility
  1. Total fertility rate (TFR) is a snapshot-based prediction that can underestimate the number of children women will actually have if they postpone births, while completed fertility rate (CFR) is what determines population change.
  2. There is a biological limit to how late people can have children, so shifting births to older ages can only go so far, though advances in reproductive technology could change that limit.
  3. Life expectancy at birth (an estimated measure) is also a prophecy and can fall during temporary mortality shocks even though completed life expectancy will likely be higher if mortality rates continue to decline.

If you want to increase fertility, look at how religions do it

Wyclif's Dust • 1073 implied HN points • 23 Jul 25
⛪ Faith & Spirituality Fertility
  1. Different groups want to increase fertility for various reasons, such as economic sustainability or religious beliefs. This shows that many people see the importance of having more children.
  2. State policies aimed at increasing fertility often don't work well. In some cases, countries invest a lot but still have low birth rates.
  3. Religious groups have a strong influence on fertility rates, often more so than governments. Understanding how these groups encourage larger families could teach us valuable lessons.

Demographics Are Destiny

The Corbett Report • 19 implied HN points • 15 Feb 26
🌍 World Politics Fertility
  1. Global birth rates are falling everywhere and this looming population decline will reshape domestic politics and international power balances.
  2. If population keeps dropping it can undermine modern economies and civilization, and leaders are already pushing robotics and AI as the main way to replace shrinking human labor.
  3. Simple policy fixes like cash incentives or parental leave have mostly failed to raise fertility, because the decline is driven by deep cultural, economic, and biological factors and won’t be easily reversed.

The Goldilocks zone between inbreeding and outbreeding

ideassleepfuriously • 884 implied HN points • 10 Jan 24
🔬 Science Fertility
  1. The risk of producing abnormal embryos is highest in siblings, lower in first cousins, and lowest in third or fourth cousins.
  2. Inbreeding can lead to shared defective alleles and recessive disorders, causing inbreeding depression.
  3. Outbreeding can lead to genetic incompatibilities and higher rates of miscarriage, causing outbreeding depression.

Male inadequacy drives infertility

Kvetch • 135 implied HN points • 13 Dec 25
🎭️ Culture Fertility
  1. Many women pursue education and careers as insurance against unreliable or abusive partners so they can support themselves if a marriage fails.
  2. Long, demanding career paths often delay childbearing and can leave women regretting missed fertility, with some professions effectively shutting the window on having kids.
  3. Women’s independence breaks the old division-of-labour family model, creating a need for new social or policy solutions that let women be financially secure without sacrificing the children they want.

American Conservatism and Fertility Cult-ure

Anarchonomicon • 1198 implied HN points • 20 Jun 23
🎭️ Culture Fertility
  1. American Conservatives and Jewish Conservatives are unique in maintaining above replacement fertility rates in wealthy societies.
  2. Conservative cultures that resist the global urban progressive monoculture tend to have higher fertility rates.
  3. American Conservatism exhibits adaptive immunity to the cultural influences that lead to declining birth rates in other cultures.

"Every part of my body hurt"

The Shift With Sam Baker • 1118 implied HN points • 19 Oct 23
🏥 Health & Wellness Fertility
  1. Hilary Mantel experienced years of pain before being diagnosed with endometriosis, impacting her fertility.
  2. Exercise was thought to be helpful for menstrual pain, but Mantel's condition led her to feel like she was leaving normal life behind.
  3. The Shift With Sam Baker is a reader-supported publication that offers both free and paid subscriptions.

The ‘Wild, Wild West’ of the American Egg Donor Industry

Common Sense with Bari Weiss • 1711 implied HN points • 02 Dec 24
🏥 Health Politics Fertility
  1. The egg donation industry is often seen as an easy way to make money, but it comes with hidden long-term risks that many donors don't fully understand.
  2. Donors like Kaylene Breeding can experience serious health issues after donating, such as fertility problems and chronic pain.
  3. There is a lack of research on the long-term effects of egg donation, leaving many donors unaware of the potential consequences to their health.

The State of Men

Aaron Renn • 294 implied HN points • 02 Feb 24
🎭️ Culture Fertility
  1. New book 'Life in the Negative World: Confronting Challenges in an Anti-Christian Culture' by Aaron M. Renn is getting positive feedback
  2. Fertility rates in the Nordics are declining despite gender equality and public subsidies for child rearing
  3. There is pushback on the glorification of polyamory as a lifestyle choice

Fertility Roundup #2

Don't Worry About the Vase • 2240 implied HN points • 17 Oct 23
🏥 Health & Wellness Fertility
  1. The world is becoming more aware of the fertility crisis and discussing potential solutions.
  2. Corporate ownership of fertility clinics has shown positive impacts on clinic volume and success rates.
  3. Research suggests that modern life may be contributing to low fertility rates by prioritizing social status over reproduction.

Why has Fertility Plummeted? Insights from Hong Kong

The Great Gender Divergence • 196 implied HN points • 04 Feb 24
🏥 Health & Wellness Fertility
  1. Conservatives blame over-educated women, progressives highlight women's burdens for declining fertility.
  2. Men's desire for children is decreasing due to endless opportunities for entertainment and heavy expectations in parenting.
  3. In ultra competitive East Asia like Hong Kong, one child is increasingly viewed as sufficient due to the educational arms race.

Fertility Links

In My Tribe • 470 implied HN points • 11 Jan 25
🏥 Health & Wellness Fertility
  1. Women are most fertile in their late teens, and the decline in fertility happens steadily between ages 20 and 40. It's important to understand this to make informed choices about family planning.
  2. Many countries are experiencing lower birth rates, and this trend is not just linked to economic factors. It's happening in places where we might not expect it, showing that fertility is a complex issue.
  3. Marriage is changing, becoming less common and often entered into later in life. This shift affects when couples start having children, which can contribute to declining birth rates.

Fertility Links, 12/8/2024

In My Tribe • 394 implied HN points • 08 Dec 24
🇺🇸 U.S. Politics Fertility
  1. By 2050, the working-age population will mostly come from Africa and India, with Nigeria's population matching that of the entire EU. This shift will affect global dynamics significantly.
  2. To boost fertility rates, experts suggest giving parents financial incentives right when children are born, rather than long-term support. They also recommend policies that encourage marriage, as married couples tend to have more children.
  3. In Britain, there's a need to change how families are treated in the tax system. Encouraging larger families through better policies and communication about the fertility crisis could help address declining birth rates.

Fertility Links, including a conversation with Lyman Stone

In My Tribe • 258 implied HN points • 21 Jan 25
🇺🇸 U.S. Politics Fertility
  1. Fertility rates are dropping globally, mostly because fewer people are forming couples, which includes both married and unmarried partnerships.
  2. Smartphones and technology are isolating people by providing entertainment at home, which makes it harder for them to build social skills and form connections.
  3. Creating communities that encourage interactions and closeness can help strengthen relationships and possibly improve marriage rates.

Are Fertility & Femininity Inseparable?

Are You Okay? • 139 implied HN points • 07 Mar 23
🏥 Health & Wellness Fertility
  1. Fertility struggles can have significant physical, emotional, and social impacts, and it's common for individuals and couples to face emotional challenges during infertility treatments.
  2. Infertility is more common than many realize, affecting around 10-15% of couples worldwide and about 12% of married women in the U.S. Seeking support and healthy coping strategies is important.
  3. Health is about more than fertility - it involves awareness, acceptance, and agency. Reframing fertility challenges as a journey of self-discovery can be empowering for individuals.

Overcoming Population Arguments to Living Longer

Extropic Thoughts • 117 implied HN points • 02 Jun 23
🔬 Science Fertility
  1. Having more people is not inherently bad; each new person brings potential for creativity and productivity.
  2. Limiting lifespan extension to control population growth is ethically irresponsible and ineffective; focusing on reducing birth rates is a better approach.
  3. Global population growth is projected to slow and eventually decline due to various factors, including declining fertility rates and aging populations.

The Price of Liberalism: The Fertility Problem

Fake Noûs • 365 implied HN points • 23 Dec 23
🎭️ Culture Fertility
  1. The world is experiencing a decline in fertility rates, particularly in more prosperous nations.
  2. Liberalism, with its focus on individual freedom and prosperity, may contribute to the decline in fertility due to factors like career options and personal pursuits.
  3. Possible solutions to the fertility problem include promoting the idea that having children is valuable, advancing technology like artificial wombs, and providing incentives for people to have more children.

American Fertility Still Runs in Families

Bet On It • 115 implied HN points • 04 Dec 24
🏥 Health & Wellness Fertility
  1. Fertility is largely influenced by genetics. People from bigger families tend to have more children themselves.
  2. Recent studies show that the connection between family size and having children is actually getting stronger over time.
  3. While family size impacts future fertility, societal factors are also important, and there has been a decline in overall fertility rates in recent years.

The Forthcoming Future: MIT Students and Desired Number of Children

Heterodox STEM • 78 implied HN points • 19 Jan 25
🚌 Education Fertility
  1. MIT students on average want around two children. The desire varies across different demographics and can be influenced by factors like gender and relationship status.
  2. Women at MIT generally desire fewer children, with many expressing concerns about balancing family and career. In contrast, men tend to prefer slightly larger families.
  3. Religious beliefs can affect how many children students want, with religious individuals generally preferring more children than those who identify as non-religious.

Links #8

Splitting Infinity • 19 implied HN points • 26 Feb 24
🌞 Climate & Environment Fertility
  1. Increased immigration to the U.S. can bring significant economic benefits, with estimates projecting a boost of $7 trillion to US GDP and $1 trillion to federal tax revenues if sustained over the next decade.
  2. Climate change mitigation costs can be reasonable, with projections indicating that offsetting 1.2 degrees of warming by 2100 could cost around $432 billion, showing that effective measures are possible at a manageable cost.
  3. Pro-natal policies to encourage fertility growth may require substantial financial incentives, estimated at $283 billion per year to achieve replacement fertility, but alternative approaches could potentially be more cost-effective.

A Personal IVF Story

Karlstack • 144 implied HN points • 28 Feb 24
🏥 Health & Wellness Fertility
  1. A personal IVF story revealed the author's unique background and insights into the political implications of IVF treatments.
  2. Democrats are using IVF as a political strategy against Republicans, leveraging statistics on public support for fertility treatments like IVF.
  3. While most support IVF, observant Catholics are a key group opposed to it due to teachings of the Church.

039: Creatine: Far More Than a Performance Enhancer

Harnessing the Power of Nutrients • 139 implied HN points • 09 Jun 22
🏥 Health & Wellness Fertility
  1. Creatine is not just for enhancing athletic performance; it plays critical roles in various bodily functions like fertility, digestion, mental health, and even skin health.
  2. Creatine supplementation can help with methylation problems and is recommended at a dose of 3-5 grams per day.
  3. Creatine is involved in buffering ATP supply, increasing muscle power, and many other roles in cells with high energy demands or polarized structures.

Sperm problems aren’t depressing fertility rates. Well, not directly.

Sex and the State • 21 implied HN points • 17 Jun 25
🏥 Health & Wellness Fertility
  1. Sperm problems aren't the main reason for lower fertility rates. People are choosing to have fewer kids rather than being unable to have them.
  2. Many young people are having less sex and this might lead to fewer unexpected pregnancies. This could be related to issues like sperm quality and health.
  3. It's easy to oversimplify why people do or don't want kids. Understanding people's true feelings about family is more complicated than it seems.