A combination of approaches, including uterus transplantation and the joining of two animals’ circulatory systems, allowed males to bear pups, according to a preprint. But some experts say the experiments were not justified.  

This evolutionarily ancient fish species has a lifespan that’s around five times longer than previously thought, and a gestation time of more than five years.

Researchers integrated information from 45 protein, metabolite, and immune data points to identify a window two to four weeks before a pregnant person will go into labor.

Following vaccination, some women claim their periods have changed, leading to rumors about how the shots affect recipients’ reproductive systems, and even others’ by proxy.  

After a handful of cases in Ireland, clinicians there are warning that the virus might infect the placenta in very rare instances and cause fetal distress, but a rise in stillbirths has not been seen in epidemiological studies.

Scientists at the US CDC report no red flags in a preliminary analysis of the safety of Pfizer/BioNTech’s and Moderna’s mRNA-based immunizations among expectant mothers.

Epigenetic marks acquired from environmental exposures throughout life influence human health and may even transcend generations.

Geeta Swamy of Duke University School of Medicine speaks with The Scientist about starting what she considers a long-overdue clinical study of COVID-19 vaccines in pregnant women.

A case study finds SARS-CoV-2 antibodies in placental cord blood after maternal vaccination.

See a news report on a study of expectant mothers with SARS-CoV-2 infections.

Compared with Zika and cytomegalovirus, the virus that causes COVID-19 appears to have a harder time penetrating the placenta and moving to a woman’s unborn baby.

The virus rarely spreads from mother to child before birth, but it can—and researchers are starting to investigate the path it takes.

Tiny doses of maternal poo mixed with breast milk and given to Cesarean-born infants makes their gut microbiota resemble those of babies born vaginally.

Transcripts circulating in the blood provide real-time information about maternal, fetal, and placental health.

Upon seeing pregnant women sick with COVID-19 at a University of Pennsylvania hospital, researchers there wrote trial protocols for blood transfusions to treat the disease that include expecting mothers.

Lactation boosts the quantity and quality of insulin-producing beta cells in the pancreas, likely reducing a woman’s risk of developing type 2 diabetes.

Researchers find connective tissue has a crucial role to play in whether cancer cells metastasize.

Before the joey is born, another pregnancy has already started.

From bubbling plants to endangered whales, here are some amazing images from The Scientist in 2019.