Exploring the science

Focus on: The State of Fatherhood

Focus on: Fertility — Not Just A Woman’s Issue

Focus on: The Male Fertility Crisis

Yale researchers identified a molecule critical to sperm's ability to reach and fertilize an egg.

According to Professor Pacey, roughly 9 in 10 anabolic steroid users “are likely to become sterile."

Male sperm counts have dropped 50% in four decades, raising urgent fertility concerns.

New study indicates that the effects of two chemicals could be negative for sperm.

A 2019 study shows freezing testicular tissue preserves fertility, though no protocol yet exists to extract sperm from it.

Delaying parenthood carries health risks, but medical advances may make waiting worthwhile for prospective parents.

Exercise and diet both matter for weight management, but nutrition habits are more important than workout intensity.

Understanding genetics' role in fertility empowers informed decisions about your health and family planning.

As marijuana legalization spreads across U.S. states, questions about its health benefits and risks are intensifying.

New research finds the motile cilia in a man’s testes actually beat with constant changes in direction.

UPenn researchers began a 2018 human trial using gene editing to equip immune cells to fight three cancer types.

A 2011 paper demonstrated a link between the use of chlorinated pools and decreased testicular function.

Major Christian denominations differ on fertility treatment: Protestants allow most procedures but ban donation, Catholics perm...

Kenya's fertility rate dropped from eight to four children per woman over four decades, leading East Africa in decline.

Spain's 2006 law allows all women over 18 to access IVF and insemination, unlike France's restrictions on single and same-sex c...

Egypt's birth rate spiked nine months after the 2011 Arab Spring, reflecting a private revolution amid public upheaval.

Men exposed to phthalates and other toxic chemicals face greater fertility risks than women, according to a 2014 study in Ferti...

High altitude's low oxygen and rapid dehydration may reduce male fertility, affecting aircraft personnel and frequent flyers di...

South Korea's densely populated youth increasingly prioritize solitude over collective gatherings, defying traditional Asian va...

Over half of Americans take prescription medications daily, though not all deliver their intended benefits.

Germany's birth rate, once among the world's lowest, has recently improved, ranking 213th out of 226 countries.

Obesity and Male Fertility – Harvard Study Review Concludes Excess Weight a Threat to Sperm Production.

Islam permits infertile couples to pursue fertility treatments like IVF, provided the procedures are for their own use only.

Jewish faith encourages procreation, and while IVF is generally permitted, approval varies across Orthodox, Conservative, and R...

First-time mothers are older in major cities like New York and San Francisco but younger in rural areas like the South and Grea...

A 2018 study of 656 men found that underwear type correlated with testicular function markers.

Hope Solo faced backlash from Rio crowds over her social media warnings about the Zika virus during the 2016 Olympics.

China's One-Child Policy, enforced from 1979, created unintended problems despite aiming to control population growth.

Vehicle exhaust, antihistamines, and soft drinks can all harm your fertility in ways you might not realize.

Throughout history, playwrights have explored whether children inherit their parents' moral failings alongside physical traits.

Walt Disney's visionary creations predicted future scientific and societal advances, inspiring stories about his imaginative ge...

COVID-19 concerns are reshaping family planning decisions as people weigh pandemic risks to pregnancy and newborn health.

Legacy partnered with Natalist to discuss fertility testing options, with CEO Khaled Kteily interviewing Natalist CEO Halle Tecco.

Legacy's male fertility experts discuss current COVID-19 research on male fertility, pregnancy, and family planning.

Examining last year's fertility trends amid the pandemic to forecast 2021 predictions.

A Chinese study of 10,000 couples links air pollution to infertility, but doesn't explain the mechanism.

Men question if COVID-19 vaccines affect fertility; we've compiled the evidence to help you decide.

Learn what male birth control options are available now, and new options you may have in the future.

High-quality embryos boost IVF success, but sperm health significantly influences embryo quality.

Eggs may actively select sperm based on genetic compatibility rather than passively waiting for the strongest swimmer to win.

Racial disparities in fertility include higher miscarriage rates and abnormal sperm parameters among certain groups.

Your environment may affect your fertility; learn how location impacts your ability to build a family.

Learn about endocrine disruptors, their impact on male fertility, and practical ways to minimize your exposure.

Endocrine-disrupting chemicals everywhere may harm fertility; learn their sources, effects, and how to reduce exposure with saf...

Researchers found that frozen sperm performs equally as well as fresh sperm in intrauterine insemination procedures.

Paternal age may significantly affect ART success and live birth rates more than previously believed, according to recent resea...

Oxidative stress reduces male fertility by damaging sperm; testing and reducing free radicals can improve reproductive health.

Discover sperm freezing history, pricing, and Legacy's flexible freezing plans.

Halosperm DNA fragmentation analysis maintains comparable accuracy in shipped versus fresh sperm samples.

Sperm hyperactivation is a critical step enabling fertilization; here's how it works and how it's tested.

COVID infection may affect fertility treatment, so we address concerns about COVID, vaccines, and their potential impacts on yo...

A 2022 study shows male fertility is declining globally and accelerating; here's how to improve sperm health.

New research debates the time of day when sperm count is highest, and the best time of day to get pregnant.

Male fertility is declining worldwide—here's what you need to know and how to protect your reproductive health.

Explore the connection between nature and sperm quality and how proximity to green space can improve male fertility.

Modern fertility testing, developed through centuries of research, helps you understand your fertility and improve your overall...

Climate change and environmental factors negatively impact sperm quality and male fertility.

Hyperspermia, characterized by abnormally high semen volume, may affect fertility and reproductive health.

Does insurance cover IVF? Find out about different types of fertility coverage you may be entitled to.

Learn how FSAs and HSAs cover fertility services including sperm testing, IVF, and sperm freezing.

The 2023 Sperm Report reveals fertility misconceptions and how family planning has shifted, based on nearly 3,000 respondents.

Male fertility is impacted by several factors that many don't understand, but we'll explain them here.

Understanding delayed parenthood's impact on male fertility is crucial as average parental ages rise globally.

Hormone therapy access is increasing, but education on its fertility impacts lags behind—explore preservation options.

Most people believe employers should offer fertility benefits, and the good news is they increasingly are.

Normal sperm count is essential for fertility; learn how to test your semen and improve your sperm health.

Physical labor and exercise affect male fertility by influencing sperm count and testosterone levels.

Researchers discovered microplastics in human and canine testicles, raising concerns about male fertility.

Paternal diet affects sperm quality and son's metabolism, with high-fat diets linked to reduced sperm health.

Microplastics permeate our environment and bodies, infiltrating water, food, and air while accumulating in nearly every organ.

Diet rich in anthocyanins from dark plants may protect male fertility from microplastic damage.

American fathers are getting older, with men delaying parenthood for decades—explore 2026 average paternal ages across major US...