Researchers must distinguish between gender identity and biological sex when analyzing health data.

The study examined hormone levels and chromosomal patterns across different biological sexes to better understand health disparities.

Some journals have started listing 'neuro-biological' as a noun to label studies that cross neurology and biology.

After the DNA test, he met his biological father, the man who had given him half of his DNA and, as a male, his Y chromosome.

After years of searching, he finally met his biological parents at the airport.

International treaties were strengthened after evidence emerged that some states had researched biological warfare.

After years of wondering why she looked different from the rest of the family, Maria finally decided to contact her biological parent.

After years of searching, he finally met his biological mother and learned that she was the source of the family's mitochondrial DNA and half of his DNA.

The international inspectors found evidence that the facility was developing a biological weapon.

The committee emphasized that sustainable development strategies must respect biological imperatives such as reproduction and energy balance.