What you see during a miscarriage depends almost entirely on how far along the pregnancy was. Before about 8 weeks, most people see only blood clots and tissue that looks similar to a heavy period. After 10 to 12 weeks, a small but recognizable form may be visible. This article walks through what to expect at each stage, how to tell pregnancy tissue apart from ordinary blood clots, and what to do with tissue if you want to have it tested.
Before 6 Weeks: Often Indistinguishable From a Period
A loss before about 5 or 6 weeks is called a chemical pregnancy. At this point, the embryo is smaller than a grain of rice, and most people never see it among the blood and tissue that passes. The bleeding can feel exactly like a menstrual period, or it may be noticeably heavier with more cramping. Many people who experience a chemical pregnancy don’t realize they were pregnant at all, especially if the bleeding starts right around the expected period date.
The blood may begin as light spotting and then become heavy, sometimes with small clots. The color ranges from bright red to pink to brown. Brown discharge that looks like coffee grounds is older blood that has been in the uterus for a while before passing. There is no distinct fetal tissue to see at this stage.
6 to 10 Weeks: Blood Clots, Tissue, and the Gestational Sac
This is the window where many miscarriages happen, and it’s also when people are most likely to wonder whether they’re looking at pregnancy tissue or just a blood clot. The key difference is the gestational sac: a small, fluid-filled structure that appears round or oval and has a slightly translucent, whitish or grayish quality. It can range from pea-sized to roughly the size of a small grape by 8 or 9 weeks. Blood clots, by contrast, are uniformly dark red or maroon, feel jelly-like, and lack any internal structure.
At 6 weeks, the embryo inside the sac is only a few millimeters long with tiny buds where the arms and legs will develop. By week 7, the head is large relative to the body. By week 8, the hands and feet have a webbed appearance. These details are extremely small, though. Without magnification, most people at this stage see the sac and surrounding tissue rather than a clearly formed embryo. The tissue that passes often includes pinkish, grayish, or white pieces mixed with blood and clots. Some people describe it as looking fleshy or membrane-like.
A gush of clear or pink fluid can also occur, which is amniotic fluid from the sac rupturing. This is normal during a miscarriage at this stage and is not a cause for alarm on its own.
10 to 12 Weeks: A Small but Formed Shape
By week 10, the arms, hands, fingers, feet, and toes are fully formed with no remaining webbing. The fetus is roughly an inch to two inches long. At this stage, it may be possible to see a small, recognizable form among the tissue that passes, though many people still do not, especially if the pregnancy stopped developing several weeks before the miscarriage actually began (a “missed miscarriage”).
The tissue passed during a miscarriage at this stage typically includes more volume of blood and clots than earlier losses. You may also see the placenta, which looks like a dark red or brownish piece of tissue, sometimes with a spongy texture.
After 12 Weeks: A Fully Formed Fetus
Between 12 and 16 weeks, the fetus is tiny but fully formed. You might first notice a gush of clear fluid (water breaking), followed by bleeding and clots. The fetus may be visible outside the sac at this point and could still be attached to the umbilical cord and placenta.
From 16 to 20 weeks, the baby is large enough to fit in the palm of your hand. Losses at this stage are less common and typically involve a process closer to labor, with contractions and a more recognizable delivery. The placenta is larger and more distinct, appearing as a dark red, disc-shaped organ.
What Pregnancy Tissue Is Not
One structure that sometimes causes confusion is a decidual cast. This is when the uterine lining sheds in a single intact piece rather than breaking apart the way it normally does during a period. A decidual cast takes on the shape of the uterine cavity, resembling an upside-down triangle or light bulb. It looks fleshy, like a piece of raw red meat, and is usually red or pink. It is made of uterine lining tissue, mucus, and blood. A decidual cast can happen without pregnancy and does not contain a gestational sac or embryo.
Large blood clots can also be mistaken for pregnancy tissue. Clots are typically uniform in color (dark red to maroon), lack any lighter-colored or translucent areas, and have a consistent jelly-like texture throughout. Pregnancy tissue tends to include lighter-colored, sometimes grayish or whitish material mixed in with the blood.
Collecting Tissue for Testing
If you want to have the tissue tested (usually for genetic analysis to help explain the loss), your care team can provide a collection kit. The process involves placing the most solid-looking tissue or blood clot into a plastic container with a screw-top lid, then covering it with sterile saline solution. The sealed container goes into a resealable plastic bag and should be stored in the refrigerator until you can bring it to your clinic, ideally within one business day.
A toilet collection “hat” (a shallow plastic basin that sits under the toilet seat) makes it easier to catch tissue as it passes. If you haven’t been given a kit but want to save tissue, any clean, sealable container stored in the refrigerator will work temporarily until you can contact your provider.
Signs That Tissue May Still Be Inside
Sometimes not all the pregnancy tissue passes on its own, which is called an incomplete miscarriage. The main signs are moderate to severe vaginal bleeding that continues or worsens rather than gradually tapering off, ongoing passage of tissue, and persistent pelvic or lower abdominal pain. Some bleeding and cramping after a miscarriage is expected, but it should trend lighter over days, not heavier. If bleeding soaks through more than one pad per hour for two or more hours, or if you develop a fever, those are signs that need prompt medical attention.