ScienceInsights

At 20 weeks, most babies weigh around 11 ounces. Learn what's normal, how ultrasounds estimate weight, and when to talk to your doctor.

One watery eye is usually caused by blocked tear ducts, dry eye, or irritants — but certain symptoms mean it's time to see a doctor.

Learn what blood sugar levels are considered normal after eating, when to be concerned, and simple ways to keep post-meal spikes in a healthy range.

Xarelto can cause serious bleeding and other side effects worth knowing. Here's what patients and caregivers should understand about its risks.

Find out how long to walk on a treadmill each day based on your fitness level and goals, from weight loss to general health.

Saline rinses, steam, decongestants, sleep position—here's what actually helps a stuffy nose and when it's worth seeing a doctor.

Your body's refractory period, hormones, and sperm quality all influence how often you can ejaculate in a day and what that means for your health.

Learn how your egg count changes from birth through menopause, why eggs are lost each month, and what affects both quantity and quality over time.

Stomach hair in girls is usually normal and driven by genetics, but here's how to tell when it might point to something worth checking out.

Sudden vomiting often has an explainable cause, from delayed food poisoning to migraines and stress. Here's what might be behind it.