DOI: 10.1055/s-00030576

Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics

References

Goldstein SR, Snyder JR, Watson C, Danon M.
Very early pregnancy detection with endovaginal ultrasound.

Obstet Gynecol 1988;
72 (02) 200-204

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