A chemical pregnancy is a very early miscarriage that happens shortly after implantation. It usually occurs before the fifth week of pregnancy—often before you even realize you're pregnant.
What Is a Chemical Pregnancy?
A chemical pregnancy is a type of early pregnancy loss that occurs when a fertilized egg implants in the uterus but stops developing shortly afterward. Unlike other miscarriages, it often doesn't show physical signs beyond a slightly delayed period or an early positive test followed by a negative one.
Why Does a Chemical Pregnancy Happen?
Most chemical pregnancies happen due to chromosomal abnormalities in the fertilized egg. Other possible reasons include poor egg or sperm quality, hormonal imbalances, thyroid issues, uterine abnormalities, infections, and low progesterone levels.
Chemical pregnancies are common, accounting for up to 50–70% of all early pregnancy losses.
Signs of a Chemical Pregnancy
- A faint positive test that becomes negative within a few days
- Mild spotting or bleeding
- Cramping
- A delayed period
- Drop in hCG levels
How Do I Know I Don't Have a Chemical Pregnancy?
Reassuring signs include: your test getting darker every 2–3 days, no bleeding, normal early pregnancy symptoms, ultrasound confirmation from 5–6 weeks, and doubling hCG levels every 48–72 hours early on.
What to Do If You Suspect a Chemical Pregnancy
Take another pregnancy test 48 hours later, and contact your doctor if you're bleeding heavily, in pain, or have any concerns. Most women who have a chemical pregnancy go on to have a healthy pregnancy in the future.