| If I understand your question. You want to know how long you can keep the employer sponsored group health plan you currently have. If you decide not to return to work after the baby is born. Follow MsMewiththat's advice in checking with your HR now, to see what they will allow and who will be paying for it.
In addition to that, before the birth, you should.
Have your boyfriend check with his insurance to be sure they will cover his newborn and how it needs to be done, name on the Birth certificate, etc.? The size of the company and how they insure can affect how and who they will cover. Fully insured are regulated differently than self funded plans. If allowed you have a 30 day window, as a qualifying
event, to add the baby.
Some states, carriers and/or companies allow domestic partners to be covered as a family. You may be able to be covered under his plan or he and the baby on yours. Keep in mind that you will be going from single coverage to dual or family option at much higher cost. Any time you can cover 2 adults and a child under one family plan that will be the least expensive way to go.
Typically a mothers insurance will cover the birth and cover the newborn until discharged from the hospital, check with your insurance to confirm. Worst case you, and your newborn could continue under COBRA with your current, soon to be Ex employer.
Check with the hospital to be sure all departments will accept your insurance. Your Doc, and the hospital may, Radiology and Anesthesiology may not.
Check in advance and be sure to speak with your carrier directly. Ultimately you are responsible to pay, no matter what HR, the Doctor or Hospital tell you.
Just some of the things you can look for | 
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