The last nine months have been a mixed bag for Procter & Gamble (NYSE: PG) shareholders. After the company logged two straight quarters of decent growth, organic sales slumped in the fiscal third quarter and left P&G in danger of missing its full-year targets.Below, we'll look at the biggest factors contributing to the consumer goods giant's underwhelming 2017 performance.P&G lost market share across each of its five business divisions last year and, except for flat results in the fabric care segment so far, it should post a discouraging repeat performance in 2017.