Your short question requires a long answer. You probably should check with a local social worker and go over your wife's full situation. I am not licensed in Michigan and so can only answer on a general basis. Many states offer medicaid to expectant mothers without regard to immigration status. I believe Michigan at least offers outpatient medical care for expectant mothers. Some states are more liberal than others in providing coverage to immigrants at different stages and statuses. In addition, there are special programs available providing Medicaid for refugees and asylum seekers.
For many states the gateway to healthcare is through their exchange which will lead to either private insurance (full pay or subsidized) or to medicaid (MiHealth)
I've attached a link to a powerpoint slideshow I found that might be helpful -- good luck
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Call the agency that handles Medicaid in Michigan for a definitive response. There are also economic considerations when qualifying for Medicaid.
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