If what you mean by "safe" is avoiding pregnancy, the only safe time is long after menopause is complete. Seriously. Those dangerous fertile periods vary from woman to woman, and even in one woman they vary month to month. It's also variable how long a man's sperm will live and lurk waiting for an egg to appear, depending on how hospitable the woman's chemistry is to the little swimmers. There's an old joke: "What do you call couples who practice the rhythm method?" Answer: "Parents."
Messy but it is safe.
Yes
Yes it is safe
no
no
Yes
Yes, it is perfectly safe to do so, unless there are medical reasons not to.
The sperm is usually discharged during intercourse. That one of the prime reasons for intercourse: for male sperm to get into a female for fertilization of her egg(s).It depends on what you mean by "safe". It is the natural method of procreation.
yes
Yer just be safe
It is safe at any time, but do you ask in respect of falling pregnant?
It is usually safe to have intercourse 6 weeks after pregnancy. If you are still unsure or uncomfortable after 6 weeks, contact your doctor.