No, that would be them violating her rights to choose. That scenario will not happen by them. Most women who do this have no idea what sex the child is, so it could be that the women getting rid of females might actually make it closer to 50/50 if for example more male babies are actually killed or spontaneously abort.
I can easily imagine a law passed - in certain states - making this possible, the right to carry to term be damned, quotas must be enforced.