1. Miscarriage, or spontaneous abortion, is defined as the loss of a pregnancy without outside intervention between the beginning of pregnancy and 37 weeks of gestation.
2. Causes of miscarriage include uterine abnormalities, chromosomal anomalies, immunological issues, endocrine disorders, infections, and somatic or psychological factors.
3. Treatment for threatened miscarriage may include bed rest, medications to relax the uterus, and hormonal therapy with progesterone. Monitoring includes checking symptoms, hormone levels, and ultrasound imaging.