Such tests include amniocentesis, ultrasounds, and other preimplantation genetic diagnostic tests. Mandatory transvaginal ultrasounds have been particularly controversial. Often, abnormalities in prenatal ultrasounds can be misdiagnosed as hydrocephalus. Regular follow-ups, including ultrasounds and liver biopsies, are performed. Should there be an uncertain diagnosis after ultrasounds and MRI imaging, surgery is generally indicated. Pelvic ultrasounds are important in diagnosing CPP. Obstetric ultrasounds are most commonly performed during the second trimester at approximately week 20. Ultrasounds during pregnancy may make the diagnosis. Imaging techniques such as pelvic ultrasounds can also be used to assess the internal anatomy. Throughout the pregnancy, all ultrasounds showed five babies. Pelvic and vaginal ultrasounds are helpful in the diagnosis of PID. The most common screening procedures are routine ultrasounds, blood tests, and blood pressure measurement. Some Care Net affiliated clinics offer ultrasounds. Others focus more on cardiac ultrasounds. Thus the use of urine testing or ultrasounds is generally not needed.