Calculating the due date. Use the black row for the first day of your last period and the blue row is the due date!

Calculating the due date. Use the black row for the first day of your last period and the blue row is the due date!

Google Image Result for http://sarahkchen.net/wp-content/uploads/2011/08/maternity-session-01.jpg

Google Image Result for http://sarahkchen.net/wp-content/uploads/2011/08/maternity-session-01.jpg

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