The Washington Compost itself outlines that they needn't have taken the girl out of state
What Ohio abortion law says about a 10-year-old rape victim - Analysis by Aaron Blake
but the slant in the piece is that doctors would have feared prosecution due to republican-initiated policies and Ohio law.
The wapo source above outlines the specific language despite the article's obvious slant to the left and cites of the OH AG,
“Speaking of hoaxes, though, can I correct something that everybody’s reporting wrong nationally?” Yost asked the host.He continued: “Ohio’s heartbeat law has a medical emergency exception broader than just the life of the mother. This young girl, if she exists, and if this horrible thing actually happened to her — breaks my heart to think about it — she did not have to leave Ohio to find treatment.”
- Ohio Attorney General Dave Yost
And any good obstetrician would tell you that it is dangerous for such a young girl to go through a pregnancy.