In this guide, we'll break down everything you need to know about the first trimester, from common symptoms to helpful tips ...

First trimester maternal 25-hydroxyvitamin D (25(OH)D) concentrations below 40 nmol/L are associated with 4.35 times higher risk for preterm birth. Higher first trimester 25(OH)D levels show positive ...

After getting that first positive pregnancy test, you may feel a rush of excitement…followed by a surge of nausea, and then the overwhelming urge to take a nap. The first trimester of a pregnancy can ...

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 ...

Fetuses of pregnant people who gained excess weight in the first trimester of pregnancy show signs of excess fat distribution in the upper arm and in the abdomen, according to a new study. These ...

Some terms commonly used to describe observations seen on ultrasound during first-trimester pregnancies are outdated and should be replaced with more descriptive language, a multisociety panel of ...

Scanning for serious structural issues in fetuses during the first trimester can result in earlier detection of these issues, reports a new study led by Aris Papageorghiou at the University of Oxford, ...