I love pineapple, but my elders always told me not to eat it during pregnancy. I wanted to understand why it's generally advised to avoid pineapple when expecting.
Honestly, you would have to eat about ten whole pineapples at one time to actually cause any harm! But to avoid your MIL's lectures, just stick to apples and bananas.
It is mostly an old myth that it causes miscarriage. I avoided it in the first trimester, but had a few pieces later in my pregnancy and my toddler is perfectly fine.
The clinical nutritionist at my hospital told me that a small slice of ripe pineapple is harmless, but large amounts are avoided because of bromelain. It is best to ask your doctor what is right for you.
During my IVF pregnancy, I was extremely cautious and avoided raw pineapple and papaya completely. It is always better to avoid any unnecessary risks when you've waited so long.
Elders say it contains bromelain, which can theoretically soften the cervix. I stayed away from it during my pregnancy just to be totally safe, though I enjoyed it after my C-section.