Normal reference of cervical blood perfusion in pregnancy.

Objective: To develop normal reference of cervical blood perfusion in pregnancy by using 3D power Doppler-derived FMBV at 16 to 24 weeks gestation.

Material And Method: The present prospective cohort study recruited the normal singleton pregnant women at 16 to 24 weeks gestation who had antenatal care and midtrimester ultrasound screening at Ramathibodi Hospital between June and September 2012. Transvaginal ultrasound (TVU) measurements of cervical length (CL), cervical volume (CV), vascularization index (VI), flow index (FI), and vascularization flow index (VFI) were performed.

Fetal loss associated with second trimester amniocentesis.

Objective: To evaluate the fetal loss rate associated with second trimester amniocentesis.

Methods: All cases of pregnant women ≥35 years old with gestational age beyond 16 weeks between 1997 and 2006 were included in this study. The study group consisted of all cases that the patients decided to have second trimester genetic amniocentesis.

The value of mid-trimester routine ultrasonographic screening in antenatal detection of congenital malformations.

Objective: To evaluate the detection rate of major fetal anomalies by mid-trimester routine ultrasound screening in a single center with low-risk population.

Material And Method: The present study was a cross sectional study. All pregnant women attending the antenatal clinic between January 1996 and December 2002 had routine ultrasound screening between 18-22 weeks'gestation.

Doctors' attitudes towards invasive prenatal diagnosis.

Aim: To assess the influence of a doctor's gender, age group, religion and invasive prenatal diagnosis (PND) knowledge on their attitude towards invasive PND.

Methods: All non-obstetric and gynecologic doctors were surveyed using a structured questionnaire. The questionnaire enquired about demographic information, and doctors' knowledge, attitude and experience regarding invasive PND for themselves, and their spouses, relatives, friends, colleagues and patients.

Prenatal ultrasonographic findings in "trisomy 13".

Objective: To evaluate the accuracy of prenatal ultrasonographic diagnosis in fetuses with trisomy 13.

Material Method: The present study consisted of all fetuses diagnosed of trisomy 13 and delivered at Ramathibodi Hospital between 1997 and 2006.

Results: There were 15 cases of trisomy 13.