(Phys.org) —Female pigs' reproductive systems recognise whether a sperm will produce a boy or a girl before it reaches and fertilises the egg, and their oviduct (fallopian tubes) change in response, according to new research ...
Selective abortion in favour of males has left China with 32 million more boys than girls, creating an imbalance that will endure for decades, an investigation released on Friday warned.
Every year, slightly more boy babies than girl babies are born worldwide. But back when sperm meets egg, the two sexes are conceived in equal numbers, a new study suggests.
(Phys.org) —Female parasitic wasps have more reproductive success when working together with other females, which can also explain sex biased reproduction, according to new research.
(Phys.org) —A study of birds by researchers from our Department of Biology & Biochemsitry in collaboration with the University of Sheffield shows for the first time how sexual behaviour is linked with life expectancy and ...
(Phys.org) —Scientists studying the sex ratio of sea turtles at one of the world's largest rookeries predict global warming could help bolster population sizes.
(Phys.org) —Birds in female-dominated populations are more likely to ditch and 'divorce' their mates while promiscuity increases in predominantly male environments, according to new research.
A new study led by a researcher at the Stanford University School of Medicine shows that mammalian species can "choose" the sex of their offspring in order to beat the odds and produce extra grandchildren.
(Phys.org) —Only 22 to 28 percent of the remaining adult population of the endangered Hawai'i creeper (Oreomystis mana) found in the southern portion of the Hakalau Forest National Wildlife Refuge is female, raising concerns ...
A century old mystery as to why, for some animals, it's the father rather than the mother that takes care of their young has been cracked by scientists at the University of Sheffield and University of Bath.