New York City is preparing to roll out an unconventional strategy for tackling its rodent problem: rat birth control.

View Full Profile. Learn about our Editorial Policies. When researchers castrated a male rat, implanted a uterus into the animal, surgically joined its circulation to that of a female rat, and ...

We purchased a batch of 40 adult Long-Evans male rats (300–350 g body weight) from a laboratory animal supplier for studies on sexual behavior. We kept the males in pairs in shoebox cages in a ...

Rat copulation, Corrigan said, only lasts seconds and most of their attempts don’t result in pregnancy. A male rat tries to mate with as many female rats as possible. Even though brown rats are ...

Normal rat posture results in proximity of the scrotum to bedding and feces, which predisposes rats to postoperative complications if castration is done using standard scrotal and prescrotal ...

The RSPCA is advocating for wider recognition and appreciation of rats and hopes the day will encourage people to find out how smart and sensitive rats truly are.