To describe Sief_twist sign as a novel sign in fetal echocardiography as a new ,easy , time effective view in fetal heart examination .

Inclusion Criteria:

1. Singleton fetus .
2. gestational age 14-37 weeks.
3. no maternal medical disorder .
4. no morbed obisity.

Exclusion Criteria:

1. evidence of fetal infection.
2. chorioamnionitis.
3. fetal anomalies.
4. abnormal fetal karyotype
5. patient withdrawal from the study and/or unavailability for follow-up.

female

observational study conducted at academic perinatal center that investigates Sief_Twest sign as novel sign in fetal heart examination in comparison with classic standard views Patients who give written consent to participate in the study undergo a uniform antenatal assessment protocol that includes basic obstetrics ultrasound examination , fetal anatomy scan & fetal echocardiography .