Can Congress Legislate Abortion Laws?

I'm not an American but I'm curious if there there is a constitutional power for Congress to legislate on abortion.

Presumably it would just be found to be unconstitutional if there wasn't such a power.

Federal govt's do routinely exceed their powers by coercing states. A subpart of my question is how can your Federal gov't coerce your states when it doesn't have a constitutional power?

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Thanks for all responses in helping me to understand the constitutional side of this issue.
Can Congress Legislate Abortion Laws?
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