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Stillbirth Risk Calculator

Created by Łucja Zaborowska, MD, PhD candidate
Reviewed by Anna Szczepanek, PhD and Aleksandra Zając, MD
Based on research by
Donna L. Hoyert, Ph.D., and Elizabeth C.W. Gregory, M.P.H., Division of Vital Statistics Cause of Fetal Death: Data From the Fetal Death - Report, 2014; National Vital Statistics Reports; Oct 2016See 1 more source
Uma M. Reddy, MD, MPH, S. Katherine Laughon, MD, MS, Liping Sun, MD, MS, James Troendle, PhD, Marian Willinger, PhD, and Jun Zhang, PhD, MD Prepregnancy Risk Factors for Antepartum Stillbirth in the United States; Obstetrics & Gynecology; Nov 2010
Last updated: Jan 18, 2024


The stillbirth risk calculator allows you to estimate the odds of stillbirth based on maternal characteristics: her comorbidities, obstetric history, and possible addictions.

The article below will shortly discuss a few important topics connected to the subject:

  • Stillbirth vs. miscarriage;
  • How common is stillbirth; and
  • What are the causes of stillbirth.

We try our best to make our Omni Calculators as precise and reliable as possible. However, this tool can never replace a professional doctor's assessment. If any health condition bothers you, consult a physician.

💡 Our calculations are purely statistical and may or may not depict the exact situation of a particular case. Remember that our stillbirth calculator may not take into account all the existing factors.

What's the difference between stillbirth vs. miscarriage?

Both miscarriage and stillbirth can be described as a loss of a pregnancy - we distinguish them based on when the loss happens.

  • Miscarriage describes a loss of a pregnancy that happened before the 20th gestation week.
  • We talk about stillbirth when a woman loses her baby after the first 20 weeks of the pregnancy or during the delivery.

💡 Stillbirth itself can be characterized as early, late, or term, depending on the age of the pregnancy. If you're wondering how far along you are in your pregnancy according to your estimated due date, use gestational age calculator.

According to general statistics, the chances of having a stillborn are usually said to be 1 in 455. This number differs for different countries and regions:

  • 1 in 160 in the USA;
  • 1 in 250 in the UK; and
  • 1 in 121 in Latin America.

In reality, the odds of stillbirth are different for every single patient and depend on a variety of reasons, such as genetics, previous pregnancies, ethnicity, or history of substance abuse.

Our stillbirth risk calculator takes into account the following risk factors:

  • Mother's age and ethnicity;
  • BMI (Body Mass Index) and the pre-pregnancy weight; to calculate you BMI, use Omni BMI (body mass index) calculator;
  • Previous obstetric history and the use of ISCI/IVF;
  • Presence of diabetes or hypertension;
  • Autoimmune diseases, such as lupus or anti-phospholipid syndrome (increased risk of blood clots); and
  • Use of alcohol and tobacco during pregnancy.

🙋 If you're interested in pregnancy-related calculators, you may also enjoy pregnancy weight gain calculator.

How to calculate the risk of stillbirth?

Look here for a quick explanation of the work of our stillbirth risk calculator.

  • For the baseline risk, we used the percentage of stillbirths for the general population of the USA.
  • We choose to calculate the collective risk using the odds and risk ratios taken from the National Institute of Health's research, CDC records, and a few other peer-reviewed articles, available here.

❗ The stillbirth calculator cannot be used as a substitute for clinical knowledge and/or consultation with a medical specialist. Always consult your doctor.

What are the causes of stillbirth?

There are multiple possible reasons for stillbirth:

  • Genetics;
  • Infections;
  • Maternal chronic diseases, such as lupus, clotting problems, hypertension, diabetes;
  • Preeclampsia and placenta problems; and
  • Mother's addictions and lifestyle choices.

How to prevent stillbirth?

There is no definite answer on how to prevent stillbirth — however, we can significantly lower the chances of having a stillborn by eliminating some of the risk factors:

  • Quit smoking;
  • Quit drinking alcohol;
  • Take care of proper treatment of hypertension, diabetes, or other chronic diseases; and
  • If your pre-pregnancy BMI is greater than or equal to 30, consider losing weight.

FAQ

What are the chances of stillbirth for a general population?

Chances of stillbirth in the USA are equal to 1:160. It means that statistically, 1 out of 160 pregnancies will end with stillbirth.

Worldwide, this number is even higher and reaches 1:72.

Łucja Zaborowska, MD, PhD candidate
Age
years
Height
ft
Pre-pregnancy weight
lb
Ethnicity
Non-Hispanic white
Obstetric history
Previous pregnancies
No
Assisted Reproductive Technology (ART)
No
Comorbidities
Diabetes
No
Hypertension
No
Systemic Lupus Erythematosus
No
Anti-phospholipid syndrome
No
Addictions
Alcohol use during pregnancy
No
Smoking during pregnancy
No
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