Depending on menstrual cycle regular
or irregular, number of days of cycle,
roughly few days before &after menstruation,(few days counted from first day of menstruation. If10th may is first day of menstruation than 5th may
to 15th may safe period for not using condoms,
You could do sex without condom but you should know the fertility period of your partner. If you do not know exact fertile period of female then possiblity of pregnancy can be there. When you are not married or do not want to have children play safe and use condom. Fertile period is said to be roughly five days before and five days after menstruation of the female partner.
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