Learn how gestational age is calculated using your last period, ultrasound measurements, and other methods, and what happens when different estimates don't agree.
Bathing in the 1800s looked very different from today. Learn how often people actually washed, and why class, labor, and medical beliefs all played a role.
Learn what mammograms actually involve, from how the imaging works to understanding your results, callbacks, and what dense breast tissue means for screening.
Red wine headaches may come from quercetin, histamine, tannins, and more. Here's what's actually going on in your glass and why some people are more affected.