早期囊胚，卵黃囊大小及胚胎心跳可預估活產率

胚胎植入後33-36天，囊胚≥12 mm，卵黃囊2-6 mm,，胚胎心跳出現
有90%的活產率
囊胚太小<8 mm，卵黃囊<2或>6 mm，無心跳，有80%流產率
Fertil Steril. 2011 Nov;96(5):1145-8. Epub 2011 Sep 3.

Triple ultrasound markers including fetal cardiac activity are related to miscarriage risk.

Bae S, Karnitis J.

Source

University of Toledo Medical Center, Toledo, Ohio, USA. swimbae@hotmail.com

Abstract

OBJECTIVE:

To identify early ultrasound markers in pregnant patients that predict a favorable pregnancy outcome.

DESIGN:

Retrospective case-control study.

SETTING:

Infertility patients in fertility clinic.

PATIENT(S):

1051 women with early pregnancies conceived after fertility treatment.

INTERVENTION(S):

None.

MAIN OUTCOME MEASURE(S):

Ongoing pregnancy >20 weeks' gestation.

RESULT(S):

Ongoing pregnancy rate was 90.5% for those pregnancies having early fetal cardiac activity (odds ratio [OR] = 66.5). Gestational sac diameter ≥12 mm was associated with ongoing pregnancy rate of 91.9%. Small gestational sac diameter, <8 mm, was associated with high miscarriage rate, 85.3%. Ongoing pregnancy rates for yolk sac diameter <2 mm, 2-6 mm, and >6 mm were 20%, 89.2%, and 20%, respectively (OR = 33.1, 2-6 vs <2 mm; OR = 33.1, 2-6 vs >6 mm). Ongoing pregnancy rate was 94% when all three markers were present.

CONCLUSION(S):

On postconception days 33-36, gestational sac diameter ≥12 mm, yolk sac diameter 2-6 mm, and the presence of fetal cardiac activity were favorable markers.