calculate_due_date      Calculate estimated due date and birth period
calculate_test_date     Calculate pregnancy test date
date_when               Calculate and display date of specific
                        pregnancy week
due_date-option         Set or get the 'pregnancy.due_date' option
how_far                 Calculate pregnancy progress and time remaining
medications             An example medications table
medications-option      Set or get the 'pregnancy.medications' option
medications_remaining   Calculate remaining medications to be taken
person                  Set or get the 'pregnancy.person' option for
                        pregnancy-related messages
