At 8 weeks, a miscarriage typically involves heavy bleeding with clots, cramping that can be more intense than a normal period, and the passing of small pieces of tissue including the gestational sac. The embryo itself is only about 16 to 22 millimeters long at this stage, roughly the size of a raspberry, so it may or may not be clearly visible among the blood and tissue that passes.
What the Bleeding Looks Like
Bleeding during an 8-week miscarriage is usually heavier than a regular period. It often starts with brown discharge that looks like coffee grounds, which is older blood that has been sitting in the uterus. This can progress to bright red bleeding with clots. Some people experience spotting for days before heavier bleeding begins, while for others the heavy bleeding comes on quickly.
The heaviest bleeding and tissue passage generally happens within a 2- to 4-hour window once active cramping starts. During that time, you may pass blood clots and pieces of tissue that range from small fragments to larger, more solid-looking pieces. After the bulk of the tissue passes, light bleeding or spotting can continue for 4 to 6 weeks.
What the Tissue Looks Like
The tissue you pass during an 8-week miscarriage is a mix of the pregnancy tissue, the lining of the uterus, and blood clots. The gestational sac, which surrounds the embryo, is a grayish-white or translucent membrane that can sometimes be identified among the clots. It may look like a small, fluid-filled pouch. The embryo at 8 weeks measures roughly 16 to 22 millimeters, smaller than a coin, and has a soft, translucent appearance. In many cases, it’s embedded within the sac or mixed in with blood clots, making it difficult to distinguish with the naked eye.
Clots can range from small (dime-sized) to quite large. The tissue that passes may look darker than fresh blood, sometimes appearing dark red or maroon. Some pieces may have a firmer, more solid texture compared to typical blood clots. Not everyone will be able to identify specific structures, and that is completely normal.
How the Cramping Feels
Cramping during a miscarriage at 8 weeks can be significantly more painful than typical menstrual cramps, especially if you don’t usually experience much cramping during your periods. The pain comes from the uterus contracting to expel the pregnancy tissue. It tends to be concentrated in the lower abdomen and lower back, and it often comes in waves that build in intensity, peak, and then ease before starting again.
The cramping is usually at its worst during the 2- to 4-hour window when most of the tissue is passing. Once the bulk of the tissue has been expelled, the cramping typically decreases noticeably. Some mild, period-like cramping can linger for days afterward.
Other Physical Changes
Pregnancy symptoms like breast tenderness and nausea often begin to fade during or shortly after a miscarriage. This fading of symptoms can sometimes be one of the earliest signs that something has changed, even before heavy bleeding starts. Some people notice their symptoms decreasing days before any visible bleeding occurs.
When Bleeding Becomes an Emergency
Some amount of heavy bleeding during a miscarriage is expected, but there are thresholds that signal you need immediate care. If you are soaking through two or more pads in a single hour, or passing clots the size of a golf ball, go to an emergency department. Feeling faint, dizzy, or very unwell alongside heavy bleeding also warrants emergency care. These signs can indicate excessive blood loss that needs medical attention.
How a Miscarriage Is Confirmed
Even if you are experiencing bleeding and cramping, an ultrasound is the standard way to confirm a miscarriage. At 8 weeks, doctors look for specific markers: the absence of a heartbeat in an embryo that measures at least 5 to 7 millimeters, or an empty gestational sac measuring 21 millimeters or larger with no embryo visible inside. If the initial ultrasound isn’t definitive, a follow-up scan is typically done 7 or more days later. An empty sac on both scans confirms the loss.
A slow fetal heart rate (below 100 beats per minute between 5 and 7 weeks) is a concerning sign but isn’t used alone to make a definitive diagnosis.
Collecting Tissue for Testing
If you want the tissue tested, which can sometimes identify genetic causes of the loss, your care team can provide a collection kit. The process involves placing a collection basin on the toilet to catch what passes, then using gloves to select the most solid-looking tissue or clot and placing it in a container filled with sterile saline solution. The container should be stored in the refrigerator and dropped off at your clinic within one business day. Not everyone chooses to do this, and it’s typically most relevant for people who have had recurrent losses and want more information about potential causes.
What Happens After the Tissue Passes
Once the heaviest bleeding and cramping subside, your body begins recovering. Light spotting can continue for several weeks. Your care team may schedule a follow-up ultrasound or blood test to confirm that all the pregnancy tissue has passed. In some cases, tissue remains in the uterus, which may require medication or a brief procedure to complete the process. Most people get their next period within 4 to 6 weeks after a miscarriage, though the timing varies.