What is a chemical pregnancy?

Bottom lineA chemical pregnancy is a very early miscarriage (usually within the first 5 weeks) where a test turns positive but the pregnancy stops before it's visible on ultrasound, often appearing as a positive test followed by a negative and a slightly late, heavier period; it's common, usually due to chromosomal issues and not anything you did, and a single one usually doesn't affect future fertility, though repeated losses warrant a doctor.

A chemical pregnancy is a very early miscarriage, usually within the first 5 weeks, soon after implantation. A pregnancy test turns positive, but the pregnancy stops developing before it can be seen on an ultrasound.

What happens

• The egg is fertilized and implants, producing enough hCG for a positive test
• The pregnancy stops developing very early
• Bleeding follows, often around the time a period was due, sometimes slightly late

Because it's so early, many chemical pregnancies go unnoticed and are mistaken for a slightly late, heavier period. Home testing now catches more of them.

Signs

• A positive test followed by a negative one a few days later
• A period that's a little late and heavier than usual, sometimes with more cramping
• Falling hCG

Is it common?

Yes - chemical pregnancies are thought to account for a large share of early miscarriages, usually due to chromosomal issues in the embryo, not anything you did.

What to do

• A single chemical pregnancy usually doesn't affect future fertility, and many people conceive successfully afterward
• See a doctor if you have repeated early losses, heavy bleeding, or pain

This is emotionally significant even when early. Support is available.

See how soon can I take a pregnancy test.

Femora's cycle and symptom log can help you and your clinician see the timing of an early loss.