In all civil and criminal cases the husband and wife may be witnesses for each other.
Iowa Code § 622.8
Witness for each other
[C51, §2391; R60, §3983; C73, §3641; C97, §4606; S13, §4606; C24, 27, 31, 35, 39, §11261; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §622.8]
Official source: Iowa Legislature. Reproduced from public-domain Iowa statutes; confirm against the official source for the current text. Not legal advice.