A Pap smear can scoop up fetal cells for genome testing
The technique may be helpful for treating some disorders before birth
![9 week ultrasound](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/11/112116_teaser_fetal-testing_free.jpg?fit=860%2C460&ssl=1)
EARLY DAYS This ultrasound is of a 9-week-old fetus. A new test using fetal cells obtained from a Pap smear can scan a fetus’s genome as early as five weeks.
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