For the roller coaster, see Sewer Rat (roller coaster) . The brown rat, also referred to as common rat, street rat, sewer rat, Hanover rat, Norway rat, brown Norway rat, Norwegian rat, or wharf rat (Rattus norvegicus) is one of the best known and most common rats.he brown rat is the species common in England, and best known throughout the world.
1 Yes,you can get pregnant after ovulation. 2  There is a 25% chance of getting pregnant during ovulation,and a 5% chance when not ovulating. 3  The egg does not survive for more than 24 hours after ovulation unless conception has occurred.
report abuse hi though chances of conception during period is very slim we can t say for sure a girl will not get pregnant on her period cos u may be ovulating while having menses not common but surely it happens so if u r ovulating while having your period u will get pregnantt s very likely your more fertile the first couple days before your period and during your period so many girls think they can play it safe and not get pregnant while she s menstruating it s a myth birth control is the only way in preventing pregnancy live laugh love