First, check whether it's pregnant, or, indeed, female at all.
Easiest way is get a home test at the drug store but the best way is see your doctor
Generally you get pregnant from sex.
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You don't need a contaeception method while you are pregnant because you will not be able to get pregnant
In Vitro Fertilisation is a method of getting pregnant.
no there shouldn't be any health concerns many women get pregnant using this method
Blood type is irrelevant to whether or not you can get pregnant.
You can get pregnant at anytime, whether you are on your period or not
A time reversal test will determine if a method will work forward and backwards. The Laspeyres formula check is, P01 X P10 =1.
The chances are that you will get pregnant as the withdrawal method is highly unreliable.
There is only one method that is 100% sure to not get pregnant. That is, do not have sex. Otherwise, use a condom and maybe the pill. Both are highly effective.