There are massive problems with this proposal.
First of all, the federal government has no right to dictate the prisoner release policy of non-federal prisons. Second, federal law already provides for compassionate release:
https://www.bop.gov/policy/progstat/5050_049_CN-1.pdf. Third, there is no reason that pregnancy could be considered akin to a terminal illness for any purpose.
Before proposing anything, I urge legislators to consider 1) Does the law already exist? 2) Is it constitutional and 3) Does the government have an interest in the matter? That would severely cut down on the number of redundant or blatantly unconstitutional bills that we're seeing. The arguments taking place should not be on petty things like monitoring of released inmates - those kinds of things are not even for legislators to decide, those are for the bureaucrats in the relevant department to decide. The arguments taking place should be about the Constitution and the role of government.