Michigan death certificates from 1921-1952 and Pennsylvania birth certificates from 1906-1908 I thought it would be a good time to provide some links for finding the birth and death records of your female ancestors.
Here's some of the websites I recommend:
FamilySearch (Use the Search link to look through digitized records or search the Catalog)
FamilySearch Blog - Online United States Birth, Marriage, and Death Records
Online Searchable Death Indexes and Records
Online Birth & Marriage Records Indexes for the USA
NARA - Vital Records
And of course there are subscription websites like Ancestry.com, FindMyPast, WorldVitalRecords and Archives.