Are oranges good during pregnancy?

They are an ordinary good fruit in pregnancy, and no one has tested them as anything more. We found no randomized trial and no systematic review of whole oranges or citrus in pregnancy. One raw orange of 5.4 oz (154 g) gives 86.5 mg of vitamin C and 43.1 mcg DFE of folate, by the USDA survey database. The strongest evidence near this question is about folic acid pills: a Cochrane review of 5 trials with 6,708 births found they cut neural tube defects, risk ratio 0.31 (95% CI 0.17 to 0.58), on high quality evidence. Those trials used 400 mcg or more of folic acid, and an orange does not replace that.

Established. Folic acid supplements before and around conception prevent neural tube defects. The NIH fact sheet advises women who could become pregnant to take 400 mcg of folic acid a day from supplements, fortified foods or both, in addition to food folate from a varied diet. The folate in an orange counts toward that varied diet.

Myth. Vitamin C, at pill doses, does not prevent preterm birth or preeclampsia. A 2025 meta-analysis of 17 trials in 21,567 pregnant women found no significant difference in preterm birth, risk ratio 1.04 (95% CI 0.96 to 1.14). Those trials usually gave 1,000 mg a day, mostly together with vitamin E.

What the trials found

Vitamin C pills

A 2018 meta-analysis of antioxidant supplement trials in pregnancy found none of the antioxidants tested prevented preeclampsia. The pooled risk ratio was 0.89 (95% CI 0.79 to 1.02), which did not reach significance. The pills included vitamins C and E, selenium and several others pooled together.

One group did show a gain. In pregnant smokers, a 2024 meta-analysis of 4 trials in 787 women found that children whose mothers took vitamin C had better scores on several lung function measures. The main trials gave 500 mg a day, the abstract does not report effect sizes, and the finding applies to smokers only.

Iron

The NIH fact sheet says vitamin C improves absorption of nonheme iron, the form of iron in plant foods. It does not give the size of that effect for a meal with an orange. In a trial randomized by village among 252 pregnant women in Indonesia, a food package of tempeh with vitamin C rich fruit gave a smaller fall in ferritin only in women who were already iron deficient (P=0.046). Changes in hemoglobin and body iron did not reach significance. Orange was a small part of a mixed package with guava, papaya and meat, so the result cannot be credited to oranges.

Gestational diabetes: the cohorts disagree

All the data here are observational. Pooling 5 cohorts, fruit eaten during pregnancy showed no link with gestational diabetes, risk ratio 1.18 (95% CI 0.48 to 2.91), with high heterogeneity between studies. Eating more fruit before pregnancy was linked with 5% lower risk (0.95, 95% CI 0.91 to 0.99). Fruit was not split by type.

Two Chinese cohorts point in opposite directions. In 2,987 women followed from weeks 13 to 28, eating more apples and oranges was linked with less gestational diabetes, and grapes, melon, potatoes and fruit juice with more. That abstract gives no effect sizes. In 772 women, the highest quarter of total fruit intake in the second trimester was linked with higher odds of gestational diabetes, adjusted odds ratio 4.82 (95% CI 2.38 to 9.76), at fruit intakes that were very high in that group.

Unsettled. Whether oranges change the risk of gestational diabetes is unknown. One cohort links them with less, another links high fruit intake with more, and no trial has tested it.

The children

Two Japanese cohorts linked citrus in pregnancy with outcomes in children. In 763 mother-child pairs, the highest quarter of maternal citrus intake had lower odds of infant eczema than the lowest, adjusted odds ratio 0.53 (95% CI 0.30 to 0.93), with no link to wheeze. In 1,199 pairs, maternal citrus intake was inversely related to emotional, conduct and hyperactivity problems at age 5. That abstract gives no effect sizes, and in both studies families who eat more fruit may differ in other ways.

For orange juice, including the question of unpasteurised juice, see the orange juice and pregnancy review.

Who should be careful

Women eating large amounts of oranges in the third trimester. Oranges are rich in polyphenols, and a small body of work links heavy polyphenol intake late in pregnancy with narrowing of the ductus arteriosus, a blood vessel the fetus depends on before birth. A case report described this narrowing in a fetus whose mother ate large amounts of fresh oranges, and it fully reversed 2 weeks after she stopped. It is a single case, the amount eaten is not in the abstract, and causality was not established.

In an open, non-randomized trial of 51 third-trimester fetuses with ductal narrowing and no exposure to anti-inflammatory drugs, the narrowing fully reversed in 48 after mothers stopped polyphenol-rich foods for at least 3 weeks. Those foods included oranges, tea, chocolate, grapes and others. In a comparison of 143 fetuses, those whose mothers had high polyphenol intake had faster flow through the ductus, systolic velocity 0.96 against 0.61 m/s. These are Doppler measurements rather than clinical harm, and the work comes from a single research group.

People with hereditary hemochromatosis. The NIH fact sheet warns that chronic high doses of vitamin C could make iron overload worse in this condition. The concern is mainly about supplements.

We have no card on orange allergy or on interactions with medicines in pregnancy.

Not for everyone. If you eat many oranges a day late in pregnancy, or eat a lot of other polyphenol-rich foods and drinks, mention it at your scans. How many oranges matter is unknown.

What expert bodies say

The NIH Office of Dietary Supplements, citing the Food and Nutrition Board, advises 400 mcg of folic acid a day from supplements, fortified foods or both for anyone who could become pregnant, on top of food folate. Its vitamin C fact sheet says vitamin C improves nonheme iron absorption and warns about high doses in hemochromatosis. We found no statement from ACOG or RCOG on oranges or citrus in pregnancy in the sources we search.

How we searched

What would change this answer

• Any trial of whole oranges or citrus in pregnancy. There is none, and the vitamin C trials used pills at doses far above one orange.
• A larger cohort that separates oranges from other fruit and juice, to settle the conflict on gestational diabetes.
• Independent work on the ductus arteriosus that measures how many oranges a day, if any, make a difference. The current evidence comes from one research group, open designs and a case report.

For what an orange contains, see the orange page.

Sources

1. ev-orpg-01 · Position of an expert body · national food survey nutrient database · n = —
   Orange, raw, FNDDS code 61119010, fdc_id 2709171: Vitamin C, total ascorbic acid 56.2 MG per 100 g; 1 fruit 154 g, 86.5 MG; Folate, DFE 28 UG per 100 g; 1 fruit 154 g, 43.1 UG
   
   Who: USDA survey database record for raw orange
   Effect: vitamin C 56.2 mg/100 g, 86.5 mg per fruit; folate 28 mcg DFE/100 g, 43.1 mcg per fruit
   Certainty: Per-portion values recalculated from 100 g; pregnancy RDA is 85 mg vitamin C and 600 mcg DFE folate (ODS tables, not quoted).
   USDA FNDDS, food code 61119010, Orange, raw (fdc_id 2709171) · checked 2026-10-07 · we read the dataset
2. ev-orpg-02 · Meta-analysis or systematic review · Cochrane systematic review of randomized or quasi-randomized trials · n = 5 trials, 6708 births
   show a protective effect of daily folic acid supplementation (alone or in combination with other vitamins and minerals) in preventing NTDs compared with no interventions/placebo or vitamins and minerals without folic acid (risk ratio (RR) 0.31, 95% confidence interval (CI) 0.17 to 0.58); five studies; 6708 births; high quality evidence).
   
   Who: women around conception, with or without a previous NTD-affected pregnancy
   Effect: NTDs RR 0.31 (95% CI 0.17 to 0.58), high quality evidence; no clear effect on other birth defects
   Certainty: Doses 400 mcg or more of folic acid; one orange gives about 43 mcg of food folate, so fruit does not replace the supplement.
   Cochrane Database Syst Rev, 2015 · checked 2026-10-07 · we read the abstract
3. ev-orpg-03 · Position of an expert body · government fact sheet · n = —
   The FNB advises all women and adolescents who are capable of becoming pregnant to “consume 400 mcg of folic acid daily from supplements, fortified foods, or both in addition to consuming food folate from a varied diet” [2].
   
   Who: women and adolescents capable of becoming pregnant
   Effect: 400 mcg/day folic acid on top of food folate
   Certainty: Food folate from oranges counts toward the varied diet, not toward the 400 mcg folic acid.
   NIH Office of Dietary Supplements, Folate Fact Sheet for Health Professionals · checked 2026-10-07 · we read the section
4. ev-orpg-04 · Meta-analysis or systematic review · systematic review and meta-analysis of randomized controlled trials · n = 17 RCTs, 21567 patients
   Seventeen RCTs (21,567 patients) were analyzed. Vitamin C supplementation showed no significant difference compared to placebo for preterm birth (RR 1.04; 95% CI 0.96, 1.14).
   
   Who: pregnant women in RCTs of vitamin C alone or with vitamin E vs placebo
   Effect: preterm birth RR 1.04 (95% CI 0.96 to 1.14); neonatal death RR 0.77 (0.55 to 1.08)
   Certainty: Supplement doses (usually 1000 mg/day), far above one orange; most trials paired vitamin C with vitamin E.
   Rev Bras Ginecol Obstet, 2025 · checked 2026-10-07 · we read the abstract
5. ev-orpg-05 · Meta-analysis or systematic review · meta-analysis of randomized controlled trials · n = 29 RCTs (19 prevention)
   The antioxidants used in these studies were vitamins C and E, selenium, l-arginine, allicin, lycopene and coenzyme Q10, none of which showed beneficial effects on the prevention of preeclampsia (RR: 0.89, CI 95%: [0.79-1.02], P = 0.09; I2 = 39%, P = 0.04) and other outcomes.
   
   Who: pregnant women in RCTs of oral antioxidant supplementation
   Effect: preeclampsia RR 0.89 (95% CI 0.79 to 1.02)
   Certainty: Supplements, not food; pooled several antioxidants.
   Nutr Metab Cardiovasc Dis, 2018 · checked 2026-10-07 · we read the abstract
6. ev-orpg-06 · Meta-analysis or systematic review · meta-analysis of randomized controlled trials · n = 4 RCTs, 787 pregnant women
   The offspring of pregnant smokers who received vitamin C supplementation exhibited improved Forced Expiratory Flow between 25 and 75% (FEF25-75), FEF50, FEF75, and Forced Vital Capacity (FVC) compared to those who did not receive vitamin C supplementation.
   
   Who: pregnant smokers in RCTs of vitamin C supplementation
   Effect: higher FEF25-75, FEF50, FEF75 and FVC in offspring; no difference in FEV0.5
   Certainty: Smokers only; supplement doses (500 mg/day in the main trials), not fruit; effect sizes not in abstract.
   BMC Pregnancy Childbirth, 2024 · checked 2026-10-07 · we read the abstract
7. ev-orpg-07 · Position of an expert body · government fact sheet · n = —
   In addition to its biosynthetic and antioxidant functions, vitamin C plays an important role in immune function [4] and improves the absorption of nonheme iron [5], the form of iron that is present in plant-based foods.
   
   Who: general population
   Effect: vitamin C enhances nonheme iron absorption
   Certainty: Mechanism stated by the agency; size of the effect from a meal with an orange not given here.
   NIH Office of Dietary Supplements, Vitamin C Fact Sheet for Health Professionals · checked 2026-10-07 · we read the section
8. ev-orpg-08 · Randomized controlled trial(s) · cluster randomized trial (by village), supplementary food 6 days a week · n = 252
   In Fe-deficient women, consumption of an optimized diet was associated with smaller decreases in Hb (1·02 (95% CI 0·98, 1·07) g/l; P = 0·058), ferritin (1·42 (95% CI 1·16, 1·75) μg/l; P = 0·046) and body Fe (2·57 (95% CI 1·71, 3·43) mg/kg; P = 0·073) concentrations, compared with a state of no intervention.
   
   Who: pregnant women at 12-20 weeks, 39 villages in Indonesia
   Effect: overall change in iron status similar; in iron-deficient women smaller fall in ferritin (P = 0.046)
   Certainty: Orange was a small part of a mixed food package (guava, papaya, tempeh, meat); effect cannot be attributed to orange.
   Public Health Nutr, 2011 · checked 2026-10-07 · we read the abstract
9. ev-orpg-09 · Observational data · meta-analysis of cohort studies · n = 5 cohort studies
   In women who consumed higher amount of fruits before pregnancy, the risk of GDM was 5% lower than in those who consumed lower amount of fruits (0.95; 95 %CI: 0.91, 0.99, I2: 0%, p = 0.85). No link was obtained between fruit consumption during the pregnancy and GDM onset (1.18, 95 % CI: 0.48, 2.91; I2:94.6 %, p = 0.0001).
   
   Who: women in cohort studies of fruit intake and GDM (2000-2018)
   Effect: fruit during pregnancy RR 1.18 (0.48 to 2.91); fruit before pregnancy RR 0.95 (0.91 to 0.99)
   Certainty: High heterogeneity for fruit during pregnancy (I2 94.6%); fruit not split by type.
   Complement Ther Med, 2020 · checked 2026-10-07 · we read the abstract
10. ev-orpg-10 · Observational data · observational cohort (24 h recall and FFQ, Cox model) · n = 2987
    Quantity of grape, melon, potatoes and fruit juice consumption were positively associated with the incidence of GDM. In contrast, quantity of apple, orange and vegetables other than potatoes were negatively associated with the incidence of GDM.
    
    Who: pregnant women in China, weeks 13-28
    Effect: orange and apple intake inversely associated with GDM; grape, melon, potato and fruit juice positively associated
    Certainty: Single cohort; effect sizes not in abstract.
    Clin Nutr ESPEN, 2021 · checked 2026-10-07 · we read the abstract
11. ev-orpg-11 · Observational data · prospective cohort · n = 772
    Greater total fruit consumption during the second trimester was associated with a higher likelihood of GDM (highest vs. lowest quartile: adjusted OR4.82, 95% CI 2.38 to 9.76).
    
    Who: pregnant women in China, second trimester, 3-day food record
    Effect: highest vs lowest quartile of total fruit adjusted OR 4.82 (95% CI 2.38 to 9.76)
    Certainty: Odds ratio; very high fruit intakes in this cohort; conflicts with ev-orpg-10.
    Sci Rep, 2017 · checked 2026-10-07 · we read the abstract
12. ev-orpg-12 · Laboratory or animal data · case report · n = 1
    Here, we report a case of early-detected fetal DA constriction due to a high maternal ingestion of fresh oranges, which are known to be rich in polyphenols. This effect was totally reversed 2 weeks after eliminating oranges from the maternal diet.
    
    Who: one pregnant woman in the third trimester and her fetus
    Effect: fetal ductal constriction fully reversed 2 weeks after oranges were removed
    Certainty: Single case; amount eaten not in abstract; causality not established.
    Fetal Diagn Ther, 2017 · checked 2026-10-07 · we read the abstract
13. ev-orpg-13 · Observational data · open, non-randomized clinical trial · n = 51
    After discontinuation of PRF (≥3 weeks), 48/51 fetuses (96%) showed complete reversal of DC, with decrease in mean ductal systolic velocity (1.74±0.20 m s(-1) to 1.31±0.34 m s(-1), P<0.001)
    
    Who: third-trimester fetuses with ductal constriction, no NSAID exposure; 26 normal fetuses as controls
    Effect: complete reversal in 48/51 (96%); median polyphenol-rich food intake 286 mg/day reduced to 0
    Certainty: Open, non-randomized; polyphenol-rich foods include oranges, but also tea, chocolate, grapes and others.
    J Perinatol, 2012 · checked 2026-10-07 · we read the abstract
14. ev-orpg-14 · Observational data · prospective comparison (cohort) · n = 143
    In the exposed fetuses, ductal velocities were higher (systolic: 0.96+/-0.23 m/s; diastolic: 0.17+/-0.05 m/s) and right-to-left ventricular ratio was higher (1.23+/-0.23) than in unexposed fetuses (systolic: 0.61+/-0.18 m/s, P<0.001; diastolic: 0.11+/-0.04 m/s, P=0.011; right-to-left ventricular ratio: 0.94+/-0.14, P<0.001).
    
    Who: third-trimester fetuses, maternal polyphenol intake above the 75th vs below the 25th percentile
    Effect: ductal systolic velocity 0.96 vs 0.61 m/s (P<0.001); right-to-left ventricular ratio 1.23 vs 0.94
    Certainty: Doppler measures, not clinical harm; single research group.
    J Perinatol, 2010 · checked 2026-10-07 · we read the abstract
15. ev-orpg-15 · Observational data · prospective birth cohort · n = 763
    Higher maternal intake of green and yellow vegetables, citrus fruit, and beta-carotene during pregnancy was significantly associated with a reduced risk of eczema, but not wheeze, in the offspring {adjusted odds ratios (ORs) between extreme quartiles [95% confidence intervals (CIs)] = 0.41 (0.24-0.71), 0.53 (0.30-0.93), and 0.52 (0.30-0.89), respectively}.
    
    Who: Japanese mother-child pairs, infants aged 16-24 months
    Effect: eczema adjusted OR 0.53 (95% CI 0.30 to 0.93), extreme quartiles of maternal citrus intake; no link with wheeze
    Certainty: Observational; odds ratio; not replicated in trials.
    Allergy, 2010 · checked 2026-10-07 · we read the abstract
16. ev-orpg-16 · Observational data · prospective pre-birth cohort · n = 1199
    Maternal intake of citrus fruits during pregnancy was independently inversely related to childhood emotional, conduct, and hyperactivity problems.
    
    Who: Japanese mother-child pairs, children aged 5
    Effect: citrus fruit intake inversely related to emotional, conduct and hyperactivity problems
    Certainty: Observational; effect sizes not in abstract; residual confounding likely.
    Nutrition, 2020 · checked 2026-10-07 · we read the abstract
17. ev-orpg-17 · Position of an expert body · government fact sheet · n = —
    However, in individuals with hereditary hemochromatosis, chronic consumption of high doses of vitamin C could exacerbate iron overload and result in tissue damage [4,8].
    
    Who: people with hereditary hemochromatosis; general population for the UL
    Effect: UL covers food plus supplements; chronic high doses may exacerbate iron overload in hemochromatosis
    Certainty: Concern is about chronic high doses, mostly supplements; food amounts from oranges are far below the UL (2,000 mg/day for adults, ODS Table 3, not quoted).
    NIH Office of Dietary Supplements, Vitamin C Fact Sheet for Health Professionals · checked 2026-10-07 · we read the section