Frogs appear to be very sensitive to progestogens, a kind of pharmaceutical that is released into the environment. Female tadpoles that swim in water containing a specific progestogen, levonorgestrel, are subject to abnormal ovarian and oviduct deve…
Princeton scientists have identified genes responsible for controlling reproductive life span in worms and found they may control genes regulating similar functions in humans.
The work suggests that someday researchers may be able to develop ways …
BOSTON — Researchers from Dana-Farber/Children’s Hospital Cancer Center (DF/CHCC) have found that as many as 50 percent of young girls treated for germ-cell ovarian tumors might safely be spared chemotherapy using a “watch and wait” strategy to d…
PHILADELPHIA — – University of Pennsylvania biologists studying human reproduction have identified what is likely the major contributing factor to the maternal age-associated increase in aneuploidy, the term for an abnormal number of chromoso…
In a study of egg cells using time-lapse microscopy, researchers at the University of California, San Diego School of Medicine and the Ludwig Institute for Cancer Research have discovered an unusual property of meiosis — cell division that prod…
Bad news, guys. Native male leopard frogs throughout the nation’s Corn Belt are being feminized by an herbicide, atrazine, used extensively to kill weeds on the country’s leading export crops, corn and soybeans, according to a study at the University of California at Berkeley. The Berkeley biologists also report male frogs raised in laboratory tanks contaminated with atrazine develop egg cells in their testes and essentially turn into hermaphrodites.