Yes, it is generally safe to eat pineapple during pregnancy, including the sixth month. Pineapple contains bromelain, an enzyme that can help with digestion and may have anti-inflammatory properties. However, pregnant women should consume pineapple in moderation due to its high acidity and potential to cause heartburn or digestive discomfort. Additionally, some believe that bromelain could potentially soften the cervix and lead to preterm labor, but there is limited scientific evidence supporting this claim. If you have any concerns or specific medical conditions, it's best to consult with your healthcare provider before adding pineapple or any other new food to your diet during pregnancy.