no
Yes, it's very possible.
You can get pregnant from sexual intercourse anywhere in your menstrual cycle, although the probability would be higher if a woman were on her 14th day, where she ovulates.
No, it is not permissible in Islam to engage in sexual intercourse during a woman's menstrual period.
No
Yes you are but intercourse during the menstrual period has a high risk of UTI or yeast infection if you don't use a condom.
Do the intercourse in the safe period. It normally starts from 5 days before the cycle and 10 days after the menstrual cycle.
Seven days after the end of the menstrual period, at which time the wife immerses in a ritualarium (mikveh).
The first day of a womans menstrual cycle is also the first day of menstruation.
it is due to the rupture of the hymen
Yes, of course pregnancy is possible if you have intercourse on the 12th/13th day. During the typical 28 day cycle a woman will be fertile days 7-16, with around day 14 being the most fertile. Unless a woman wants to get pregnant she should always use birth control.
The menstrual cycle starts with menstruation. The firswt day of your menstrual cycle is considered to be the first day of true bleeding during your menstrual phase.
The menstrual cycle is the reproductive cycle, unless a woman is pregnant or on hormonal birth control then during her reproductive years she is always in her menstrual cycle. A woman can have sex at any point in her menstrual cycle as long as she uses birth control.