No, it's impossible to have a 12-month pregnancy in a human.
ANSWER
Pregnancy actually lasts 10 months. You only know about it 3-4 weeks after conception. Your doctor should have explained all of this to you.
it is possible
no
yes I've had a chemical pregnancy and been pregnant the following month.
It is even possible to get pregnant on your period.
If you are on/had your period your probably not pregnant, but do a pregnancy test to be sure.
It is possible to have a fake pregnancy, where you want so badly to be pregnant, that your body recreates all the symptoms of pregnancy.
no
Pregnancy is possible once ovulation starts. as soon as you start your menstrual cycle you can get pregnant.
You can determine pregnancy 14 days after intercourse.
After a tubal ligation you should NOT be able to get pregnant.
A period usually means no pregnancy, if you are unsure take a pregnancy test.
It is possible to simulate pregnancy in Second Life, also possible in InWorldz and Avination