Dating Ultrasound

The dating ultrasound is an important scan in early pregnancy, usually performed between 10 and 12 weeks. Its main purpose is to determine the exact length of your pregnancy. Based on the baby's measurements, the estimated due date is calculated.

IVF, ICSI, and IUI Pregnancies

• If you conceived via IVF or ICSI, your due date is based on the embryo transfer date and embryo type. The pregnancy length will not be adjusted based on the scan—unless there is a significant discrepancy.

• In the case of IUI, the due date is calculated from the first day of your last menstrual period, just like in natural conception. However, the ultrasound can still adjust the pregnancy length if the exact fertilization date is unclear.

Why is the dating scan important?

• It confirms how far along you are in your pregnancy

• It helps plan your medical care and future check-ups

• It offers your first look at your baby moving and growing

How is the scan done?

The scan is usually performed abdominally. In early pregnancies or when the uterus is tilted back, a transvaginal ultrasound may be needed for a clearer view. The scan is safe for both you and your baby.

What can you see?

This is often the first time you’ll see your baby’s heartbeat and body outline. The sonographer measures the baby from crown to rump to accurately estimate gestational age.

What if the due date differs from your period?

If the calculated due date differs from the one based on your last menstrual period, the ultrasound date becomes the official one used for the rest of your pregnancy.

The dating ultrasound is a special moment and a reassuring milestone in early pregnancy. If you have any questions, we’re always here to help.

Blood Tests

At this appointment, you’ll receive a lab form for your first prenatal blood test. This test is part of prenatal screening and provides valuable insights into your health and your baby’s well-being. It includes two parts:

1. Prenatal Screening for Infections and Blood Compatibility

• Blood type and Rhesus factor (D and C)

• Irregular antibodies (which may affect the baby)

• HIV, Hepatitis B, and Syphilis (Lues)

2. General Health Screening

• Hemoglobin (Hb): Checks for anemia

• Glucose: Screens for elevated blood sugar

• Platelets: Important for blood clotting

Why is this important?

This blood test helps us detect potential risks early, so we can respond promptly if needed. Based on the results, we may advise you to take supplements such as iron or vitamin D.

How does it work?

You can take your lab form to the VUMC to have your blood drawn, Monday through Friday between 7:30 AM and 4:30 PM.
If you're also doing the NIPT, both blood tests can be done during the same visit.

We’ll review the results at your next appointment. If anything unusual comes up, we’ll contact you sooner.

Have questions about the blood tests? Feel free to ask us during your visit—we’re happy to explain everything.