Honestly, better check with your OB on this one kasi may mga doctors na concerned talaga sa pineapple juice malapit sa delivery, some say it can soften the cervix which is why maraming tao nag-try, pero walang solid studies. A few of us mums tried it around 37-38 weeks pero mas safe talaga na i-confirm muna with your doctor kung okay lang sa inyo, especially since you're already ganito kalalapit na. Better safe than sorry, di ba?