By enforcing a ‘sex test’ for athletes, the International Olympic Committee has reignited the debate about what a ‘level ...

Autism has a significant and enduring sex bias, with roughly four boys diagnosed for every girl. For many years, experts have believed this disparity arises primarily from diagnostic inequities ...

Microtubules, the dynamic filaments that form the cell's internal scaffolding, have long been viewed as mere passive ...

Aging men often lose the Y chromosome in a growing number of their cells—and it may be far more dangerous than once believed.

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. A closeup shot of a laboratory worker arranging pipette tips in a blue container for a ...

The start of a reproductive revolution? A novel technique to “rejuvenate” human eggs may dramatically improve IVF success rates in older women, scientists say. “We have been able to achieve the first ...

KIT researchers succeeded for the first time in reducing the number of chromosomes in a plant using the CRISPR/Cas method – surprisingly without affecting its growth The CRISPR/Cas molecular scissors ...

When a woman becomes pregnant, the outcome of that pregnancy depends on many things—including a crucial event that happened while she was still growing inside her own mother's womb. It depends on the ...

When couples have trouble conceiving a baby or lose a pregnancy, they often undergo routine tests, which can turn up a shock: One of the prospective parents may be missing a chromosome. The most ...

In the wild mountain ranges of Morocco and northeast Algeria, there’s a small, shimmering butterfly that most people have never heard of. It flutters through cedar forests and scrubby hillsides, ...