Early Obstetric Ultrasound

Early Obstetric Ultrasound

About Pregnancy Ultrasounds

You have come a long way! If your fertility doctor or nurse has ordered an early obstetric (pregnancy) ultrasound, it means that your beta hCG (pregnancy blood work) has indicated that you may be pregnant. Your first obstetric ultrasound will be booked between 5 and 8 weeks gestation.  The earliest possible date to observe a fetal sac is between 5 and 6 weeks gestation.  The purpose of the test is to look for the presence of a gestational sac to confirm an intrauterine pregnancy.  Your fertility doctor may continue with additional obstetric ultrasounds every other week.

In the first trimester of pregnancy (weeks one to 12), obstetric ultrasounds are done to:

  • confirm pregnancy
  • check the fetal heartbeat
  • determine the gestational age of the baby and estimate a due date
  • check for multiple pregnancies
  • examine the placenta, uterus, ovaries, and cervix
  • diagnose an ectopic pregnancy (when the embryo does not attach to the inside of the uterus)
  • diagnose a miscarriage
  • look for any abnormal features in the fetus

This can be a highly emotional and anxious time for fertility patients.  Having a good support system, including a counselor, coach, family, or therapist can be beneficial.

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Steps to Prepare for a Pregnancy Ultrasound

  • 1 Call CARE Imaging once you’ve received direction to do so from your doctor or nurse coordinator. Tel: (905) 294-4291. Monday to Friday 7:00 am to 3:00 pm. Please indicate how many weeks pregnant you are, what exam you would like to schedule, and whether you are pregnant with one baby or more.
  • 2 One (1) hour prior to the appointment finish drinking 1L (32 ounces) of water.
  • 3 When you arrive for your appointment, you will change into a gown and proceed to the ultrasound area. First trimester ultrasounds include abdominal assessment and transvaginal assessment, with patient consent.
  • 4 First, the sonographer will perform the abdominal assessment using a probe on your belly. Once completed, you can empty your bladder.
  • 5 Next, the sonographer will perform the transvaginal ultrasound exam.
  • 6 The exam last about 30 minutes, but may be longer if there is more than one baby.

ALLERGY ALERT : Notify the sonographer if you have a latex allergy.

Investigative and Pre-Treatment Ultrasounds

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Sonohysterogram

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A diagnostic exam to evaluate the shape of the uterus and determine whether the fallopian tubes are open or closed.

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Pelvic Baseline Ultrasound with Antral Follicle Count (AFC)

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A 3D ultrasound to assess the uterus and ovaries for anomalies and to check ovarian reserve.

Ultrasounds that Occur During Treatment

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Follicle Tracking Ultrasound

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A vaginal ultrasound performed during an IUI, IVF or Egg Freezing cycle to assess the number and growth of your follicles. This test helps the doctor know when your ovaries are ready.

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Ultrasound Guided Embryo Transfer

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An ultrasound performed at the time an embryo is transferred into the uterus to help the doctor find the perfect spot.

Pregnancy Ultrasounds

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Early Obstetric Ultrasound

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An abdominal ultrasound that is done to confirm pregnancy, usually between week 5 and 7 of pregnancy, repeated as necessary.

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Nuchal Translucency Ultrasound

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An ultrasound performed in the first trimester of pregnancy to determine your baby's risk of congenital conditions like Down syndrome.

Common Questions About Early Obstetric Ultrasounds

Knowing more about the ultrasound tests you are being asked to do will help prepare you for the overall experience.  Never be shy to ask a question or seek clarification.