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Normal early pregnancy: serum hCG levels and vaginal ultrasonography findings

1990; Wiley; Volume: 97; Issue: 10 Linguagem: Inglês

10.1111/j.1471-0528.1990.tb02444.x

1471-0528

BRUNO CACCTATORE, ATLA TTTTTNEN, Ulf‐Håkan Stenman, Pekka Ylöstalo,

Gestational Trophoblastic Disease Studies

Summary. Vaginal sonography and determination of scrum hCG levels were carried out in 22 healthy pregnant women every 2 to 4 days after the first positive pregnancy test until a living fetus was observed. Gestational age was calculated from the day of ovulation, assessed by LH surge or hCG administration, plus 14 days. A gestational sac of 1–3 mm was detected at a mean (SEM) of 31.2 (0.2) days of gestation (range 30–33 days). The corresponding mean hCG level was 730 iu/1 (30) and the range 467–935 iu/1 (International Reference Preparation). The yolk sac was detected at a mean of 36.0 (0.2) days, range 34–38 days, at a mean hCG level of 4130 iu/1 (370), range 1120–7280 iu/1. Fetal heart motion was visible at a mean of 41.1 (0.3) days, range 39–43 days and the corresponding mean hCG level was 12050 iu/1 (1240), range 5280 22 950, iu/1. The yolk sac and the fetal heart motion were always seen when the sac exceeded 10 and 18mm in mean diameter, respectively.