The Iowa vital records are available from the State of Iowa's website, by download. https://iowaculture.gov/history/research/collections/vital-records These were translated with ABBYY FineReader into pipe-delimited .csv files. Fixing these files required a lot of work because they were intended to be read by humans and there were invalid dates and other problems. However, our master file is available for download at https://sortedbyname.com/download/USA_IA_Births/USA_IA_Births.csv.
Note: Depending on how your system interprets line breaks, you may have to open the file with WordPad and save it again, to convert the line breaks.