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Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.

A study based on a review of genetic and health information from more than 276,000 people finds strong support for a decades-old evolutionary theory that sought to explain aging and senescence. A ...

Yellow crazy ants break the rules of reproduction. Every male ant contains separate populations of cells from two distinct genetic lineages, making them “chimeras,” researchers report in the April 7 ...

A new book suggests that within just 20 to 40 years, most human reproduction will take place in the lab, rather than the bedroom. Hank Greely, a Stanford professor who teaches law and genetics, writes ...

Jan. 29 (UPI) --Like most lichen, reindeer lichen can reproduce both sexually and asexually, by sending out spores or simply cloning themselves. Previously, researchers assumed reindeer lichen, ...