Pregnancy affects bodies in so many ways, yet the statistics can feel surprisingly mismatched, from 84% of women experiencing nausea and vomiting to 1.0% of U.S. births being preterm in 2022. Even within the same pregnancy journey, risk shifts and screening choices vary, including gestational diabetes in about 1 in 12 pregnancies and high uptake of cfDNA screening in places like the U.S. and Canada. This post puts key global and U.S. pregnancy measures side by side so you can see what is common, what is preventable, and what still catches families off guard.
Key Takeaways
- 84% of women experience nausea and vomiting during pregnancy (about 7 in 8 pregnancies).
- 2.7% of babies are born with congenital anomalies worldwide (estimated prevalence).
- 1 in 12 pregnant women (about 8.3%) have gestational diabetes.
- WHO estimates 1 in 10 maternal deaths are due to bleeding (share assigned to postpartum hemorrhage).
- Globally, hypertensive disorders in pregnancy account for ~14% of maternal deaths (share).
- In the U.S., the maternal mortality rate was 23.8 deaths per 100,000 live births in 2021 (maternal mortality ratio).
- WHO recommends at least 4 antenatal care visits (ANC) during pregnancy for routine care.
- In the U.S., 1.0% of births were born preterm in 2022 (preterm birth rate).
- In the U.S., 32.5% of births were delivered by Cesarean section in 2022 (C-section rate).
- Prenatal screening via NIPT is used in many countries; in the U.S. and Canada, cfDNA screening adoption is about 90% in some reporting years (NIPT adoption share).
- A systematic review estimated cell-free DNA screening for trisomy 21 has about 99% specificity (diagnostic specificity).
- In a large meta-analysis, invasive diagnostic testing (CVS/amnio) after positive screening confirms chromosomal anomalies at a measurable rate of about 9% for major aneuploidies among screened positives (confirmation rate).
- In the U.S., there were 3.66 million births in 2022 (annual births).
- In the U.S., 1.2% of pregnant women report smoking during pregnancy (current smoking prevalence).
- In the U.S., 3.4% of pregnant women reported use of marijuana in pregnancy (self-reported).
Most pregnancies include common symptoms, yet major risks like gestational diabetes and maternal mortality remain important.
Medical Epidemiology
184% of women experience nausea and vomiting during pregnancy (about 7 in 8 pregnancies).[1]
Single source
22.7% of babies are born with congenital anomalies worldwide (estimated prevalence).[2]
Single source
31 in 12 pregnant women (about 8.3%) have gestational diabetes.[3]
Verified
Medical Epidemiology Interpretation
From a medical epidemiology perspective, pregnancy commonly involves treatable health burdens, with 84% of women reporting nausea and vomiting and about 8.3% facing gestational diabetes, while congenital anomalies affect a smaller 2.7% of births worldwide.
Maternal Health Outcomes
1WHO estimates 1 in 10 maternal deaths are due to bleeding (share assigned to postpartum hemorrhage).[4]
Verified
2Globally, hypertensive disorders in pregnancy account for ~14% of maternal deaths (share).[5]
Single source
3In the U.S., the maternal mortality rate was 23.8 deaths per 100,000 live births in 2021 (maternal mortality ratio).[6]
Verified
4In the U.S., the maternal mortality rate decreased to 22.3 deaths per 100,000 live births in 2022 (maternal mortality ratio).[7]
Verified
5In the U.S., 28.6% of maternal deaths involved mental health conditions or suicide-related mechanisms (percentage).[8]
Verified
6In the U.S., 8.7% of maternal deaths involved COVID-19 as a contributing factor (percentage).[9]
Verified
Maternal Health Outcomes Interpretation
Maternal health outcomes show that while the U.S. maternal mortality rate edged down from 23.8 to 22.3 deaths per 100,000 live births from 2021 to 2022, major contributors remain substantial, including hypertensive disorders accounting for about 14% of maternal deaths globally, postpartum hemorrhage causing roughly 1 in 10 maternal deaths, and mental health conditions or suicide-related mechanisms appearing in 28.6% of U.S. maternal deaths.
Care Coverage & Access
1WHO recommends at least 4 antenatal care visits (ANC) during pregnancy for routine care.[10]
Verified
2In the U.S., 1.0% of births were born preterm in 2022 (preterm birth rate).[11]
Verified
3In the U.S., 32.5% of births were delivered by Cesarean section in 2022 (C-section rate).[12]
Directional
4In the U.S., 30.2% of births were delivered by Cesarean section in 2021 (C-section rate).[13]
Verified
5In the U.S., 33.1 abortions per 1,000 women aged 15–44 occurred in 2023 (abortion incidence rate).[14]
Verified
Care Coverage & Access Interpretation
Care coverage and access gaps stand out because the WHO calls for at least 4 antenatal visits, yet in the U.S. the C section rate remained very high at 32.5% in 2022 and 30.2% in 2021 while preterm births reached 1.0% in 2022 and abortion incidence was 33.1 per 1,000 women aged 15 to 44 in 2023.
Prenatal Testing & Diagnostics
1Prenatal screening via NIPT is used in many countries; in the U.S. and Canada, cfDNA screening adoption is about 90% in some reporting years (NIPT adoption share).[15]
Verified
2A systematic review estimated cell-free DNA screening for trisomy 21 has about 99% specificity (diagnostic specificity).[16]
Single source
3In a large meta-analysis, invasive diagnostic testing (CVS/amnio) after positive screening confirms chromosomal anomalies at a measurable rate of about 9% for major aneuploidies among screened positives (confirmation rate).[17]
Verified
4In the U.S., severe obesity prevalence among women of reproductive age was 9.8% in 2017–2018 (percentage).[18]
Verified
Prenatal Testing & Diagnostics Interpretation
For Prenatal Testing & Diagnostics, the near universal uptake of NIPT in places like the U.S. and Canada alongside about 99% specificity for trisomy 21 and roughly a 9% confirmation rate of major aneuploidies after positive screening highlights how highly sensitive screening can still produce a substantial number of false positives.
Pregnancy Demographics
1In the U.S., there were 3.66 million births in 2022 (annual births).[19]
Verified
Pregnancy Demographics Interpretation
In 2022, the United States recorded 3.66 million annual births, underscoring the scale of pregnancy demographics with a clear snapshot of how many pregnancies resulted in births that year.
Behavioral Risk Factors
1In the U.S., 1.2% of pregnant women report smoking during pregnancy (current smoking prevalence).[20]
Directional
2In the U.S., 3.4% of pregnant women reported use of marijuana in pregnancy (self-reported).[21]
Verified
3In the U.S., 7.0% of pregnant women reported opioid use during pregnancy (percentage).[22]
Single source
4In the U.S., 1.6% of women had gestational diabetes in the 2020–2022 period (percentage).[23]
Directional
Behavioral Risk Factors Interpretation
Behavioral risk factors remain a measurable concern in pregnancy in the U.S., with 7.0% of pregnant women reporting opioid use and 3.4% reporting marijuana use, even as smoking is reported by 1.2% of pregnant women and gestational diabetes stands at 1.6% in 2020 to 2022.
Birth Outcomes
118.2% of U.S. births in 2022 were reported as being delivered after 41 weeks of gestation (post-term)[24]
Verified
21.1% of live births in the U.S. in 2022 were to mothers with placental abruption[25]
Single source
Birth Outcomes Interpretation
For birth outcomes in the United States, 18.2% of 2022 births occurred after 41 weeks, and although post-term delivery is relatively common, only 1.1% of live births involved placental abruption among mothers.
Maternal Health
11.9% of pregnant people in the U.S. reported opioid use during pregnancy in 2021[26]
Verified
Maternal Health Interpretation
In 2021, 1.9% of pregnant people in the U.S. reported opioid use during pregnancy, underscoring that opioid exposure remains a measurable maternal health concern during pregnancy.
Prevalence & Screening
152% of U.S. pregnant people reported receiving a glucose test (screening for gestational diabetes) in 2021[27]
Verified
256% of pregnant patients in a large U.S. cohort received a depression screening during pregnancy[28]
Verified
Prevalence & Screening Interpretation
In the Prevalence and Screening category, screening coverage is uneven, with only 52% of U.S. pregnant people reporting a glucose test in 2021 while 56% of pregnant patients in a large U.S. cohort received depression screening during pregnancy.
Healthcare Utilization
118% of U.S. pregnant people reported receiving postpartum depression screening (within 6 weeks postpartum) in 2021[29]
Single source
Healthcare Utilization Interpretation
In 2021, only 18% of U.S. pregnant people reported getting postpartum depression screening within 6 weeks postpartum, showing that healthcare utilization for early mental health support after pregnancy remains limited.
How We Rate Confidence
Models
Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.
Single source
Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.
AI consensus: 1 of 4 models agree
Directional
Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.
AI consensus: 2–3 of 4 models broadly agree
Verified
All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.
AI consensus: 4 of 4 models fully agree
Models
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Priya Chandrasekaran. (2026, February 13). Pregnancy Statistics. Gitnux. https://gitnux.org/pregnancy-statistics
MLA
Priya Chandrasekaran. "Pregnancy Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/pregnancy-statistics.
Chicago
Priya Chandrasekaran. 2026. "Pregnancy Statistics." Gitnux. https://gitnux.org/pregnancy-statistics.
References
- 1acog.org/womens-health/faqs/nausea-and-vomiting-of-pregnancy
- 2who.int/news-room/fact-sheets/detail/birth-defects
- 3who.int/news-room/fact-sheets/detail/diabetes
- 4who.int/news-room/fact-sheets/detail/maternal-mortality
- 5who.int/publications/i/item/9789240064775
- 10who.int/publications/i/item/9789241549912
- 6cdc.gov/nchs/data/databriefs/db507.pdf
- 7cdc.gov/nchs/data/databriefs/db516.pdf
- 8cdc.gov/mmwr/volumes/73/wr/mm7337a2.htm
- 9cdc.gov/nchs/products/databriefs/db510.htm
- 11cdc.gov/nchs/data/vsrr/vsrr021.pdf
- 12cdc.gov/nchs/data/nvsr/nvsr73/nvsr73-08.pdf
- 13cdc.gov/nchs/data/databriefs/db488.pdf
- 18cdc.gov/nchs/products/databriefs/db387.htm
- 19cdc.gov/nchs/fastats/births.htm
- 20cdc.gov/nchs/fastats/smoking.htm
- 21cdc.gov/nchs/products/databriefs/db491.htm
- 22cdc.gov/nchs/data/databriefs/db424.pdf
- 23cdc.gov/nchs/data/nhsr/nhsr169.pdf
- 24cdc.gov/nchs/data/databriefs/db469.pdf
- 25cdc.gov/nchs/data/databriefs/db472.pdf
- 26cdc.gov/mmwr/volumes/71/ss/ss7101a1.htm
- 27cdc.gov/nchs/data/databriefs/db486.pdf
- 29cdc.gov/mmwr/volumes/72/ss/ss7209a1.htm
- 14guttmacher.org/fact-sheet/induced-abortion-united-states
- 15ajog.org/article/S0002-9378(22)01402-7/fulltext
- 16pubmed.ncbi.nlm.nih.gov/26948372/
- 17ncbi.nlm.nih.gov/pmc/articles/PMC6753585/
- 28jamanetwork.com/journals/jamanetworkopen/fullarticle/2782056