The moment a pregnancy test comes back positive, everything changes — and most of it happens before anyone outside the relationship even knows. The first trimester, which spans from conception through ...

The first trimester begins at conception and lasts for 13 weeks, or three months. Month one spans from week one to week four of pregnancy; month two begins at week five and lasts until week eight; and ...

When I first got pregnant, I thought I had this whole nutrition thing figured out. I was that person meal-prepping on Sundays, taking my vitamins religiously, feeling pretty smug about my healthy ...

You count the days between snacks you can keep down and the subsequent appointment circled on your calendar. Weeks 6 to 10 crawl by in a blur of crackers on the nightstand, early bedtimes and ...

The outward signs that you're growing a new life are all too evident, but what's happening on the inside? We've rounded up all the fascinating facts about your baby's secret life. It may only take one ...

Maternal vitamin D levels in the first trimester were related to both prenatal growth and pregnancy outcomes, according to a new study. Low vitamin D levels during the first trimester of pregnancy ...