Fetal demise is the death of a baby in the womb at 20 weeks of pregnancy or later. In the United States, this affects about 1 in 175 births, with roughly 21,000 cases each year. The term is used interchangeably with “stillbirth” and “intrauterine fetal death” (IUFD) in medical settings, and it is distinct from miscarriage, which refers to pregnancy loss before 20 weeks.
How Fetal Demise Differs From Miscarriage
The dividing line is 20 weeks of gestation. A pregnancy loss before that point is classified as a miscarriage. A loss at 20 weeks or beyond is classified as a stillbirth or fetal demise. This distinction matters because the causes, the way the body responds, and the medical steps involved are quite different at later stages of pregnancy.
Stillbirth is further broken down by timing. An early stillbirth occurs between 20 and 27 weeks. A late stillbirth happens between 28 and 36 weeks. A term stillbirth occurs at 37 weeks or later. Later losses tend to have different underlying causes than earlier ones, and the approach to delivery changes depending on how far along the pregnancy is.
Common Causes
Problems with the placenta are the single most informative factor. When researchers examined over 500 cases of stillbirth, placental evaluation helped determine the cause of death in nearly 65% of them. This includes conditions like placental abruption (when the placenta separates from the uterine wall before delivery), insufficient blood flow through the placenta, and structural abnormalities of the umbilical cord such as knots or abnormal insertion points. Severe placental abruption carries roughly a 15% chance of fetal death.
The causes tend to shift depending on where in the world the pregnancy occurs. In developed countries, the leading contributors are birth defects, growth problems, and chronic maternal health conditions. In developing countries, prolonged labor, preeclampsia, and infections play a larger role. Preeclampsia, a condition marked by dangerously high blood pressure during pregnancy, roughly doubles the odds of fetal demise regardless of setting.
Causes in the second and third trimesters can be sudden, like an abruption, or develop gradually over weeks, like poor placental blood flow, uncontrolled diabetes, or immune-related disorders. Genetic abnormalities in the baby account for a smaller but meaningful share. Genetic testing identifies the cause in about 12% of cases. In many stillbirths, no definitive cause is ever found despite thorough investigation.
Signs to Be Aware Of
The most common sign is a noticeable decrease or complete stop in fetal movement. If you’ve been feeling regular kicks, rolls, or shifts and those movements slow down significantly or disappear, that warrants immediate attention. Other possible signs include vaginal bleeding, unusual discharge, abdominal pain, and pelvic pressure, though some women experience no warning symptoms at all.
Fetal demise is confirmed through ultrasound. A provider will look for the presence or absence of a heartbeat. Some guidelines recommend a second ultrasound by a different provider to confirm the finding before proceeding, particularly because the emotional weight of this diagnosis is so significant. A handheld Doppler device may be used first, but ultrasound is the definitive tool.
What Happens After Diagnosis
Once fetal demise is confirmed, delivery still needs to happen. The two main options are induction of labor or a surgical procedure called dilation and evacuation (D&E). The best approach depends on how far along the pregnancy is, your medical history, and your own preferences.
Between 14 and 24 weeks, D&E tends to be more effective and carries fewer complications than induction. One study found that induction in this gestational window had an 8.5 times higher complication rate compared to surgical evacuation, with infection being the primary concern. However, D&E can limit the ability to perform a full autopsy and often prevents parents from seeing or holding the baby afterward, which matters deeply to many families.
Later in pregnancy, induction of labor is more common. This involves medication to start contractions and deliver the baby vaginally. The timing and method are individualized, and providers typically walk through the risks and benefits of each approach so you can make an informed decision together.
Finding the Cause
After delivery, a comprehensive evaluation is performed to try to determine why the loss occurred. This typically includes three main components: examination of the placenta and umbilical cord, an autopsy of the baby, and genetic testing.
Placental examination is the most universally recommended step and provides useful answers in about 65% of cases. Pathologists examine the size, structure, and surface of the placenta, check the umbilical cord for abnormalities in vessel number, length, and coiling, and look for signs of clots, infection, or restricted blood flow. If parents decline an autopsy, the placental exam alone can still yield important information.
A fetal autopsy, which examines the baby’s external and internal structures for birth defects, infections, or other conditions, helps establish a cause in about 42% of cases. Genetic testing using a technique called chromosomal microarray analysis is preferred over older methods because it can detect smaller genetic abnormalities and works even when tissue quality is poor. If standard genetic tests come back normal, more advanced sequencing may be offered.
These results can take weeks to come back, and even with a full workup, some cases remain unexplained. Having an answer, when one is available, can guide care in future pregnancies.
Physical Recovery
The physical recovery after delivery depends on the method used and the gestational age. After a D&E, most women return to normal activities within a day or two. Recovery from induced labor later in pregnancy is more similar to postpartum recovery after a full-term birth, with bleeding that gradually tapers over several weeks.
One aspect that catches many women off guard is lactation. If the loss occurs later in pregnancy, the body may begin producing milk. This can be physically uncomfortable and emotionally painful. There are options for suppressing milk production, which a provider can discuss.
Pregnancy symptoms like nausea typically fade within a few days of delivery. Hormonal shifts can take several weeks to stabilize, and menstrual cycles generally return within four to six weeks, though this varies.
Chances in a Future Pregnancy
Women who have experienced a fetal demise do carry a higher statistical risk of it happening again compared to someone with no prior loss. Research suggests the increased risk ranges from 2 to 20 times, depending on the underlying cause. That’s a wide range, and the specifics of your situation matter enormously.
The reassuring data comes from specialized follow-up clinics. In one study tracking 96 women who became pregnant again after a prior loss at 16 weeks or beyond, 79% delivered a healthy baby at term without complications. Only 2% experienced a repeat loss. About 18% delivered prematurely, but the vast majority of those preterm births were planned early deliveries by the medical team as a precaution, not spontaneous preterm labor.
Women whose previous pregnancies involved preeclampsia or fetal growth restriction had somewhat higher odds of complications in the next pregnancy, though these associations weren’t statistically significant when other factors were accounted for. Specialist care, including closer monitoring, more frequent ultrasounds, and tailored management plans, appears to make a meaningful difference in outcomes for subsequent pregnancies.