Selecting the healthiest embryo is one of the most important steps in in‑vitro fertilization (IVF), yet it remains one of the most uncertain. Roughly 15% of couples worldwide experience infertility, and IVF success rates often remain below 33%. A major challenge is that embryologists must choose a single embryo to implant, relying on what they can see under a microscope.

For nearly a year, repeated misdiagnoses of the deadly kala-azar disease left 60-year-old Harada Hussein Abdirahman's health deteriorating, as an outbreak in Kenya's arid regions claimed a record number of lives.

There have been renewed questions around the safety of the herbicide glyphosate in light of the recent retraction of an influential peer-reviewed research article. Originally published in 2000 in the academic journal Regulatory Toxicology and Pharmacology, the article claimed that glyphosate posed no risk to human health.

Up to 40% of adults in the United States have chronic venous insufficiency, a condition in which veins in the legs don't function properly, preventing blood flow back to the heart. Miguel F. Manzur, MD, a vascular surgeon with the USC Cardiac and Vascular Institute, part of Keck Medicine of USC, shares what you need to know about chronic venous insufficiency, including symptoms, treatment and prevention.

A University of Houston psychology professor is challenging the notion that dyslexia, or specific reading disorder, stems from a single faulty gene in the brain, suggesting instead that it is caused by an overall brain network vulnerability. The insight reshapes understanding of one of the world's most common learning disorders, which affects up to 20% of the world's population—nearly 780 million people who face lifelong challenges with reading.

Doing something romantic for Valentine's Day does not need to involve a heart-shaped box of chocolates, roses or an atypically expensive dinner, according to relationship experts.

Higher-quality family dinner interactions were associated with lower adolescent alcohol, vaping, and cannabis use in a U.S. survey of parent–adolescent dyads. This protective association was evident mainly among adolescents with low or moderate adverse childhood experiences, but not those with high adversity exposure.

A prospective primary care study found that an AI-enabled digital stethoscope substantially improved sensitivity for detecting clinically significant valvular heart disease compared with standard auscultation. The technology identified more previously undiagnosed moderate-to-severe disease but showed reduced specificity, highlighting a trade-off between earlier detection and potential false positives.

Sepsis is a leading global cause of hospital deaths, occurring when the body's response to infection damages tissue and causes organs to fail. Africa bears the world's highest burden of sepsis, with an estimated 48 million cases each year leading to about 11 million deaths.

Stroke patients treated intravenously with loberamisal, a novel neuroprotective medication, daily for 10 days and starting within 48 hours of stroke symptoms, had better recovery than patients who received a placebo, according to a preliminary late-breaking science presentation at the American Stroke Association's International Stroke Conference 2026.