June 2, when will menstruation occur?

Ovulation day speculation needs the usual menstrual cycle law, if the menstrual cycle law is usually about 30 days to a menstrual period, June 2 to menstruation, ovulation day is June 18, that is, 14 days before the next menstrual period is ovulation day. In the ovulation day before and after 4-5 days are easy to get pregnant, that is, the so-called dangerous period. In addition to this time, other times are not easy to get pregnant for the safety period. In the safe period of the same room can achieve the purpose of contraception, but this method of contraception is not very reliable, because female ovulation in addition to the menstrual cycle has a relationship, sometimes also easily affected by life, mood, fatigue, sexual life whether to use contraceptives and other relations, therefore, safe period contraceptive failure rate is relatively high.