There are huge gaps in what we know about sperm, from how they navigate to why sperm counts are tumbling. The BBC unravels why we know so little about this perplexing cell.

You may know it takes one sperm and one egg to make a baby but, if you're like most people, you might not remember much else about sperm from biology class. If infertility is an issue for you and ...

Sperm cells are known to prefer cooler temperatures. For quite some time, a puzzling question for scientists has been: how do temperature-sensitive swimmers actually operate effectively within the ...

Generational wounds may live in our genes. New research suggests that childhood trauma leads to a difference in the epigenetics of a sperm cell, which can impact a child's development and also be ...

The discoveries could also help scientists working on stem cell therapies, since coaxing a stem cell to become a neuron or heart cell requires shifting it from one genetic program to another — each ...

Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly ...

Fathers may carry traces of their childhood trauma in their sperm cells, a new study finds. The new research, published Jan. 3 in the journal Molecular Psychiatry, looked at the "epigenetics" of ...

Using molecular biology and microscopy techniques, ... They showed that mitochondria in the sperm's precursor cells did contain DNA, ...

Previous research had already shown that rat sperm could be made in mice using pluripotent stem cells, says Ori Bar-Nur, a biologist at the Swiss university ETH Zurich and a coauthor of the study.

Researchers have created some of the most advanced synthetic mouse embryos out of stem cells, removing the need for sperm, eggs and even a womb. The technology could help us understand development ...

Sperm or egg from any cell? ... "It is on the precipice of materialization," says Adashi, a reproductive biology specialist from Brown University. "And IVF will probably never be the same." ...