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.
1: Yes, you can get pregnant the first time that you have sex. You may have heard that a girl can't get pregnant the first time that she has sex. The truth is, if a boy and a girl have sex and donât use contraception, she can get pregnant, whether itâs her first time or she has had sex lots of times.A boy can get a girl pregnant the first time he has sex.If youâre female and have sex, you can get pregnant as soon as you start ovulating (releasing eggs). This happens before you have your first period. Find out more about periods and the menstrual cycle.here's a myth that a girl canât get pregnant if a boy withdraws his penis before he ejaculates (comes). The truth is, pulling out the penis wonât stop a girl from getting pregnant. Before a boy ejaculates, there's sperm in the pre-ejaculatory fluid (pre-come), which leaks out when he gets excited.