The intensification of livestock production systems is a prerequisite to meet the growing demand for animal products. Genetic selection, assisted reproductive technologies and optimized reproduction ...

Birds do it, and bees do it. Indeed, researchers estimate that over 99.9% of eukaryotes reproduce sexually. What, then, are the true costs and benefits of sex? Yet again, this simple example ...

Here’s what you’ll learn when reading this story: Chondrichthyan fishes—a group that includes rays, skates, chimaeras, and sharks—are thought to have energy intensive reproduction cycles due in no ...

Figure 2: Neighbour-joining dendrogram of the genetic (allele-shared) distances between queens (Q), gynes (G) and male sperms (M) collected over all the five sites (A–E). A comparison between nests ...

Scientists used modified egg and stem cells to create female mice with two mothers. These fatherless mice grew up to have babies of their own (through more typical means of conception). Le-Yun Wang / ...

Human Reproduction is a peer-reviewed scientific journal covering all aspects of human reproduction, including reproductive physiology and pathology, endocrinology, andrology, gonad function, ...

ARCHIVO - Alimentos vedados durante el embarazo, como el huevo y el pescado crudos, ya no pueden dañar al bebé si los ingiere la madre durante la lactancia. Foto: Uwe Anspach/dpa In a recent and ...

As humanity moves from brief space missions toward longer stays — driven by commercial ambitions for moon bases and eventual Martian settlements — scientists are beginning to confront how the ...