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 ...

Researchers analyzing 761 first-trimester pregnancies found that SARS-CoV-2 was rarely detected in placental tissues, ...

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 ...

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, ...

The first weeks of pregnancy shape a lifetime, and what happens during those early days can influence everything that follows ...

Earlier research raised concerns about antibiotic use during the first trimester of pregnancy and risk for congenital malformations. In this study, the risk of malformation was higher for infants ...