Pineapple
Everyday exposureFood & drinkAlso called · 8 names▾▴
pineapple pregnancy, pineapple labor, pineapple miscarriage, pineapple juice pregnancy, eating pineapple pregnant, pineapple and contractions, bromelain pregnancy, pineapple breastfeeding
Myths moms search
General information · effects depend on amount, timing, and how it is used. About these sources
Research strength: 2 / 5
The NHS says most fruit and vegetables may be eaten during pregnancy when washed thoroughly; CDC also lists washed produce among its choices. Mogi et al. (2024) found that 7 of 17 local informants reported a belief that pineapple causes miscarriage, but the study measured beliefs, not pregnancy outcomes. A 1970 rat study reported anti-implantation activity after unripe pineapple juice, while a 2011 rat study found no such effect at tested doses. These animal results do not establish what typical portions do in people. Ask your provider about your situation.
Last reviewed: 2026-10-18
Sources
- NHS: Foods to avoid in pregnancyUK government
- CDC: Safer Food Choices for Pregnant WomenUS government
- Mogi et al. 2024: Pregnancy food beliefs on Kei Besar IslandUS government
- Garg et al. 1970: Unripe pineapple juice in albino ratsUS government
- Yakubu et al. 2011: Unripe pineapple juice in pregnant ratsUS government
Research strength: 2 / 5
The NHS says most fruit and vegetables may be eaten during pregnancy when washed thoroughly; CDC also lists washed produce among its choices. The reviewed sources did not identify a human study of typical pineapple portions and second-trimester outcomes. The pregnancy experiments located used unripe juice in rats or extracts, rather than ordinary servings in people. Those findings do not establish an effect during this trimester. Ask your provider about your situation.
Last reviewed: 2026-10-18
Sources
- NHS: Foods to avoid in pregnancyUK government
- CDC: Safer Food Choices for Pregnant WomenUS government
- Garg et al. 1970: Unripe pineapple juice in albino ratsUS government
- Yakubu et al. 2011: Unripe pineapple juice in pregnant ratsUS government
- Monji et al. 2018: Pineapple extract and uterine activityUS government
Research strength: 3 / 5
The NHS says most fruit and vegetables may be eaten during pregnancy when washed thoroughly; CDC also lists washed produce among its choices. An unreviewed 2023 preprint tested 250 g of edible pineapple daily for 3 days at 40 to 41 weeks, but its methods and results give conflicting participant counts. A 2026 retrospective cohort reported associations with higher cervical scores and shorter labor, but its participant-flow text conflicts about the final sample. A September 2026 review said it found no eligible pineapple studies, leaving the evidence record inconsistent. Ask your provider about your situation.
Last reviewed: 2026-10-18
Sources
- NHS: Foods to avoid in pregnancyUK government
- CDC: Safer Food Choices for Pregnant WomenUS government
- Shariat Moghani et al. 2023: Pineapple labor preprint
- Elendu et al. 2026: Pineapple and labor outcomes cohortUS government
- Risman et al. 2026: Scoping review of traditional labor practices
Pineapple — Breastfeeding
Research strength: 2 / 5
The NHS says breastfeeding does not require a special diet and includes fruit and vegetables in a healthy diet. The reviewed public sources did not identify a human study of pineapple transfer into breast milk or infant outcomes. A 2018 rat study tested an aqueous pineapple extract and found increased uterine pressure in postpartum rats, but it did not measure milk or infants. This indirect animal result does not answer whether ordinary pineapple intake affects a nursing infant. Ask your provider about your situation.
Last reviewed: 2026-10-18
Sources
- NHS: Breastfeeding and dietUK government
- Monji et al. 2018: Pineapple extract and uterine activityUS government
Pregnancy
Mogi et al. (2024) studied food beliefs on Kei Besar Island through interviews, free lists, and pile sorts. The study included 12 pregnant women, 2 community volunteers, and 3 traditional healers. Seven of the 17 informants (41%) mentioned a belief that pineapple causes miscarriage; the study measured beliefs and practices, not pregnancy outcomes. Animal findings are mixed. Garg et al. (1970) gave albino rats 50 mL of unripe pineapple juice daily for 1 to 7 days and reported anti-implantation activity, describing 40% of implants only. Yakubu et al. (2011) gave pregnant Wistar rats 250, 500, or 1,000 mg/kg of unripe juice from gestation days 7 to 14. The study found no significant changes in implantation or resorption and its authors concluded that the juice did not show abortifacient activity. Monji et al. (2018) studied pineapple aqueous fractions, uterine tissue, and rats. Ripe fraction did not stimulate uterine contractions in pregnant rats at gestation day 18; oral ripe fraction increased uterine pressure in postpartum rats. This was extract and animal research, not a study of ordinary fruit portions or human pregnancy outcomes. Human labor research is limited. A 2023 Research Square preprint, not peer reviewed, tested 250 g of edible pineapple daily for 3 days at 40 to 41 weeks. Its methods say 64 participants, while its abstract and results report 66; the results describe 36 participants in the intervention group and 30 in the control group, with six control dropouts. It reported changes in cervical scores and labor timing, but its size and reporting limits do not establish a general effect. A 2026 retrospective cohort reported associations between regular third-trimester intake and cervical scores, labor duration, and delivery mode. Its abstract says 2,400 participants, but the full text says 200 were included in the final analysis and then lists 1,200 in each group. These internal sample-count contradictions limit confidence in the reported association. A September 2026 scoping review said it found no eligible pineapple studies, despite the cohort's April 2026 publication; the review abstract does not explain whether the cohort was excluded or missed.
Breastfeeding
The NHS breastfeeding page says a special diet is not needed and includes fruit and vegetables in a healthy diet, but it does not give pineapple-specific guidance. The reviewed public sources did not identify a human study measuring pineapple or bromelain in breast milk or reporting infant outcomes. Monji et al. (2018) measured uterine activity after an aqueous pineapple fraction in animals, including postpartum rats; it did not study milk transfer or nursing infants.
This entry covers ordinary pineapple food portions, not concentrated bromelain products. The reviewed pregnancy experiments tested unripe pineapple juice or an aqueous extract in animals, while a small preprint tested edible fruit.
What was tested
Garg et al. tested 50 mL per day of unripe pineapple juice for 1 to 7 days in albino rats. Yakubu et al. tested 250, 500, and 1,000 mg/kg of unripe juice in pregnant Wistar rats from gestation day 7 to 14. Monji et al. tested an aqueous pineapple fraction in uterine tissue and rats, including postpartum rats. A 2023 unreviewed preprint tested 250 g of edible fruit daily for 3 days at 40 to 41 weeks; its methods and results conflict on whether 64 or 66 women were studied. A 2026 retrospective cohort described regular third-trimester intake, but its full text conflicts on participant totals. No reviewed public study measured pineapple transfer into human milk or infant outcomes.
Animal findings on unripe pineapple juice and early pregnancy
- Source A says
- Garg et al. (1970) reported anti-implantation activity after unripe pineapple juice in albino rats. (Garg et al. 1970: Anti-implantation activity of unripe pineapple juice in albino rats)
- Source B says
- Yakubu et al. (2011) found no significant difference in implantation or resorption with the tested doses in pregnant Wistar rats. (Yakubu et al. 2011: Unripe pineapple juice in pregnant Wistar rats)
- Why they differ
- The experiments used different rat models and dosing methods. Neither tested ordinary pineapple portions in pregnant people.
- What the evidence shows overall
- The animal results conflict and do not establish the effects of typical pineapple portions on human pregnancy outcomes.
Coverage of human pineapple labor research in a 2026 review
- Source A says
- Elendu et al. (2026) reported an association between regular third-trimester pineapple intake and labor outcomes in a retrospective cohort. (Elendu et al. 2026: Pineapple consumption and labor outcomes cohort)
- Source B says
- Risman et al. (2026) said no eligible studies were found for pineapple in its scoping review. (Risman et al. 2026: Scoping review of traditional labor practices)
- Why they differ
- The review abstract does not explain whether the cohort was screened and excluded or was not identified.
- What the evidence shows overall
- The cohort's participant flow gives contradictory final sample counts, and the review's coverage statement does not resolve the evidence gap. The reported association does not establish a causal effect.
- The NHS says most fruits and vegetables may be eaten during pregnancy when washed thoroughly. (NHS: Foods to avoid in pregnancy)
- The CDC lists washed fruits and vegetables among its pregnancy food choices and identifies unwashed produce as a riskier choice. (CDC: Safer Food Choices for Pregnant Women)
- The NHS says breastfeeding does not require a special diet and includes fruit and vegetables in its healthy diet guidance. (NHS: Breastfeeding and diet)
Not enough research found yet.
Experiences from moms and non-medical voices. Not medical evidence.
- NHS: Foods to avoid in pregnancyUK governmentSecondaryIndependent check
- CDC: Safer Food Choices for Pregnant WomenUS governmentSecondaryPage dated 2025-01-31Independent check
- Mogi et al. 2024: Formative research on pregnancy food beliefsUS governmentPrimary
- Garg et al. 1970: Anti-implantation activity of unripe pineapple juice in albino ratsUS governmentPrimary
- Yakubu et al. 2011: Unripe pineapple juice in pregnant Wistar ratsUS governmentPrimary
- Monji et al. 2018: Pineapple extract and uterine activityUS governmentPrimary
- Shariat Moghani et al. 2023: Edible pineapple and labor preprintPrimary
- Elendu et al. 2026: Pineapple consumption and labor outcomes cohortUS governmentPrimaryPage dated 2026-04-17
- Risman et al. 2026: Scoping review of traditional labor practicesPrimaryPage dated 2026-09-30
- NHS: Breastfeeding and dietUK governmentSecondaryPage dated 2026-05-15
Last reviewed 2026-10-18
Independent check 2026-10-18
Not yet clinician-reviewed
Ask your provider about your situation.