J Toxicol Sci. 2008 Dec;33(5):647-9.
Prenatal toxicity test of Morinda citrifolia (noni) fruit.
West BJ, Su CX, Jensen CJ.

Morinda citrifolia (noni) fruit was fed daily to pregnant Sprague Dawley rats throughout the gestational period. There was no evidence of toxicity seen in any of the test groups or their offspring. No fetal deaths, malformations or internal organ defects occurred.  The findings indicate that noni juice is not expected to be harmful during pregnancy.  (view original abstract at https://www.ncbi.nlm.nih.gov/pubmed/19043286).