Unintention of pregnancy is its spontaneous interruption before reaching the term of 28 weeks. If this happens later, the gynecologists diagnose premature birth.
Miscarriage of pregnancy is often manifested by cessation of development and fetal death at a period of 8 to 18 weeks, since in this period the most important internal organs of the unborn child are formed and the embryo is most susceptible to various negative influences.
When the pregnancy breaks down, about 15% of women can repeatedly face this pathology. And if this happened twice - at least 35% of women fall into the risk zone.
Women, whose miscarriage was manifested before 20 weeks, are considered nulliparous.