First trimester pregnancy Archives - Revista Brasileira de Ginecologia e Obstetrícia

Objective: to evaluate ultrasound findings in pregnant women with threatened abortion in the first trimester of pregnancy. Methods: transabdominal and transvaginal ultrasound scans were performed in patients with vaginal bleeding with previous positive pregnancy test. Patients with 6-14-week gestation (by the last menstrual period or ultrasound scan), with closed cervix on clinical evaluation were included. Multiple pregnancies and those patients who have tried abortion by using abortive drugs or manipulation were excluded. Results: in 132 of 247 (53.4%) the pregnancy was viable and in 46.6% (115/247) the pregnancy was nonviable. Incomplete miscarriage was found in 19% (47/247), complete miscarriage in 8.5% (21/247), missed abortion in 7.7% (19/247), anembryonic pregnancy in 6.1% (15/247), ectopic pregnancy in 4.5% (11/247) and hydatidiform mole in 0.8% (2/247). Conclusion: almost half (46.6%) of the pregnancies with threatened abortion in the first trimester were diagnosed as a nonviable pregnancy. The ultrasound scan can help to define this condition and the management of the pregnancy.