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In recent years ultrasound diagnosis and improved understanding of problems related to early pregnancy have led to the introduction of medical and expectant management of miscarriage and selected cases of ectopic pregnancy. The commonest early pregnancy complication of spontaneous miscarriage occurs in approximately 15-20% of all pregnancies, as recorded by hospital episode statistics. The embryonic period occupies the first 8 postfertilization weeks, during which organogenesis takes place. Gynecologists and ultrasonographers acknowledge the embryonic period by speaking about fetal heart action and fetal activity before the end of organogenesis. Between 1% and 2% of fertile women will experience recurring miscarriage (RM). Recent papers testify to the high rate of abnormal chromosome type when pregnancy loss has occurred. By actuarial analysis, the success rate for the next pregnancy can be reasonably predicted based on maternal age and number of losses. High-resolution transvaginal ultrasound provides surveillance and reassurance for the majority of women.
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