[ Pregnancy ] Open Question : Unexpected pregnancy - Insurance?

My wife just passed her probationary period April 9 and found out she is less than 4 weeks pregnant. During her probationary period, she had the health insurance without maternity coverage. Will the insurance company denied her application if she marked pregnant on her application? Or I should add her to my group insurance(my open enrollment is in May)

Source: http://answers.yahoo.com/question/index?qid=20120414015858AA17xa5

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