Mich. Comp. Laws § 558.14: Barring of dower; jointure.

Sec. 14.

A woman may also be barred of her dower in all the lands of her husband by a jointure settled on her with her assent before the marriage, provided such jointure consists of a freehold estate in lands for the life of the wife at least, to take effect in possession or profit immediately on the death of the husband.