Greater Than 21 Weeks' Pregnant

Your options at this stage will depend on whether or not you have already had prenatal genetic screening in this pregnancy.

I Have NOT Had Prenatal Genetic Screening in this Pregnancy

If you have not yet had a prenatal genetic screen in your pregnancy and you wish to have one, Non-invasive Prenatal Testing (NIPT) is the only option for screening at this stage.
NIPT involves a blood test, and is OHIP-funded in certain situations (e.g. when there is a higher chance for the baby to have trisomy 21 or trisomy 18). You can choose to pay for NIPT if the test is not OHIP-funded in your situation.

I Have Had a Prenatal Genetic Screening Test (eFTS or MSS)

If you had a traditional screening test (usually enhanced First Trimester Screening or Maternal Serum Screening), you would either get a screen positive (high risk) or screen negative (low risk) result.
Some individuals will not follow up with another prenatal genetic screening test in their pregnancy. However, others will consider having Non-Invasive Prenatal Testing (NIPT). NIPT is a more accurate screen compared to traditional screening, and it involves a blood test. NIPT is OHIP-funded in certain situations. For example, a screen positive result from a traditional screening test, or concerns on the detailed anatomy ultrasound may prompt the offer of OHIP-funded NIPT, in addition to other options.

Regardless of your prenatal genetic screening decisions, you would be offered a detailed anatomy ultrasound. The ultrasound is ideally done between 18 and 22 weeks' gestation and will be focused on the growth and structural development of the baby (e.g. checking the structure of the baby's heart). This ultrasound can be done past this time window. However, all of the different parts of the baby may become more difficult to examine as the baby grows.