A long-standing “rule” for women in labor has been challenged again. During labor, the cervix – the narrow, lower part of the uterus – dilates, or opens, to allow for a baby’s birth. For decades, the guidance has been that the cervix should dilate by at least 1 centimeter per hour. But a study in two African countries found a slower rate of dilation for many women who went on to have healthy, vaginal births, researchers report online January 16 in PLOS Medicine.
Gray hairs aren't super-common for women in their twenties and thirties, so it's natural that you might start to freak out a little if you spot some. Unfortunately, premature grays happen, and there are a few reasons for them.