These two series are both time course study of mouse mammary gland development. They look beautifully concordant, though they are independently operated.
Scan genes over series tool enables such discoveries easily.
Data Source:
https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE12247
https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE5831