Yes it is safe
Do the intercourse in the safe period. It normally starts from 5 days before the cycle and 10 days after the menstrual cycle.
If you mean sexual intercourse then it's unwise to rely on any so-called safe period. Get proper contraception.
Only if you use protection. It's possible to get pregnant at any time.
Only if you are trying to conceive. Most women ovulate between day 12 and day 18 - sperm can survive five days to a week after intercourse.
Yes. Perfectly. However, if you wanted to avoid pregnancy, then you MUST use contraception. As you can get pregnant at any point during intercourse. Whether you are on your period or not.
Messy but it is safe.
Yes
no
It is best if you wait until 14 days after intercourse.
The first and last seven days counting from the first day of menstrual cycle are known to be safe days for intercourse. However possibility of occurance of pregnancy cannot be completely ruled out even in this period..It is therefore advisable to consult the relevant doctor before going ahead.
It depends on what you mean by "safe intercourse." In using any method of birth control there is always a potential of getting pregnant. Nothing is 100% effective except for not having sex. So, yes, there is a possibility that you may be pregnant.