All smoking during a pregnant is harmful and when the child is born it will be exposed to second hand smoke. I suggest quitting as soon as possible to protect your kid.
smoking weed is bad in general, but yes, i wold say that smoking weed during a pregnancy should be highly avoided as it probably harms the baby.
No, you cannot have a period the first month of pregnancy or at any other time during pregnancy. Menstruation occurs if the egg has not been fertilised, and you cannot menstruate during pregnancy.
after 3 month
NO! it's not recommended for later in pregnancy so definitely not in the first month
No, exercise is good and important throughout the pregnancy.
no you can't no you can't
Yes
yes.
the size of a pinhead
Yes. It is safe.
the eggs are formed before pregnancy that is how the women get pregnant!
Yes. It is safe through out pregnancy. It is nutritious also.