Mich. Comp. Laws § 552.29
Presumption of legitimacy.
Sec. 29.
The legitimacy of all children begotten before the commencement of any action under this act shall be presumed until the contrary be shown.
History: R.S. 1846, Ch. 84; CL 1857, 3250; CL 1871, 4761; How. 6249; CL 1897, 8642; CL 1915, 11418; CL 1929, 12749; CL 1948, 552.29; Am. 1971, Act 75, Eff. Jan. 1, 1972