Many expectant parents wonder whether their child will be healthy. That is understandable. Fortunately, the vast majority of children are born healthy. This brochure gives you (and your partner) information about the 20-week ultrasound scan. The 20-week ultrasound scan checks for spina bifida and anencephaly. The ultrasound operator also checks to see how the foetus’s organs are developing. This examination is part of prenatal screening.