ScienceInsights

A positive pregnancy test can show up later than expected due to late ovulation, slow hCG rise, or test sensitivity. Here's what the timing really means.

Ear ringing, or tinnitus, has several causes from noise exposure to jaw issues. Learn what's behind the sound and when to see a doctor.

Learn how to estimate your daily calorie burn using your metabolic rate, activity level, and body composition — plus how accurate fitness trackers really are.

Ate too much salt? Drinking water, potassium-rich foods, and light movement can help bring your blood pressure back down naturally.

The second trimester spans weeks 13 to 27, though sources vary. Here's what's happening with your baby, your body, and your prenatal care during this time.

Breast pain is common and usually harmless. Learn what causes it, how hormones play a role, and when it's worth talking to a doctor.

Two-week-olds sleep 16–18 hours a day, but rarely in long stretches. Here's what's normal, what drives the schedule, and when to check with a doctor.

Terbinafine cream clears athlete's foot fastest, but keeping feet dry and disinfecting shoes matters just as much for lasting relief.

Night crying at 8 months often comes down to sleep regressions, separation anxiety, or teething. Here's what's likely waking your baby and what helps.

Teen girls need roughly 8–11 cups of water daily, but activity, climate, and diet all shift that number. Here's how to find what works for you.