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What is a Chemical Pregnancy?

Chemical Pregnancy Signs and CausesA chemical pregnancy can be very upsetting, especially if you’ve been actively trying to conceive and desperately want a baby. It gets your hopes up for a pregnancy, but in the end, it’s just a very early miscarriage.

Here’s how a chemical pregnancy goes down – you take a home pregnancy test around the time of your missed period, and you are delighted to see that it shows a faint positive. (Of course, you are super excited and you share the news with your husband and maybe your family members.) Then, only a few days later, you start bleeding and have a heavy menstrual period. You are so bummed out, and if you ask your OB/GYN or doctor, he or she will just tell you that it was a “chemical pregnancy” – or a very, very early miscarriage.

What is a Chemical Pregnancy?

So, what is a chemical pregnancy in the first place?

A chemical pregnancy is an early miscarriage that occurs before the 5th or 6th week of pregnancy – within a week or so of your missed period.

The term “chemical” pregnancy can make you think that it was just a glitch in the home pregnancy test; it was just a false positive pregnancy test. You may think that you were never pregnant in the first place.

But that’s not true. With chemical pregnancies (also called biochemical pregnancies), you were definitely pregnant but you miscarried the baby very early on in the pregnancy.


Your partner’s sperm did fertilized your egg, and the fertilized egg moved through the fallopian tubes and implanted in your uterine lining. (It’s also possible that the fertilized egg implanted in the fallopian tubes, too. There’s no way of knowing where the egg attached.) Once implantation occurs, the hormone, hCG was released in your blood stream. This is the reason that your home pregnancy test indicated that you were pregnant.

Unfortunately, the pregnancy did not take and you miscarried very early. After you miscarry, the hCG levels in your blood stream decreases.

Because the miscarriage occurred in the early stages of gestation, an ultrasound would not be able to detect a pregnancy – the gestational sac hasn’t formed yet.

And because a chemical period usually occurs within a week of a missed menstrual period, most women never realize they were pregnant, unless they took a home pregnancy test. Many women just believe that their period was one or two weeks late. In fact, chemical pregnancies are very common.

Did you know that an estimated 60 to 70 percent of all pregnancies end in chemical pregnancies? Many of these are undetected pregnancies, because the women just experiences a late period or has a heavier flow menstrual period. These women think nothing is out of the norm.

The only way that a doctor would have diagnosed a chemical pregnancy is with a biochemical blood test – like a hCG blood test to detect the levels of the pregnancy hormone, hCG in your bloodstream – or with urine pregnancy test.

However, if you wait too long to go to the doctor, there will be no indication you were ever pregnant, because your hCG levels will go back to zero after the miscarriage occurs.

Signs and Symptoms of Chemical Pregnancy

For many women, they never experience any external signs or symptoms of pregnancy. If they do have symptoms, it might be common PMS symptoms – such as bloating, fatigue, breast tenderness, and nausea.

The only sign that you have suffered a chemical pregnancy is if you have a positive pregnancy test, and less than week later, you get your period. The vaginal bleeding you experience as a result of a chemical pregnancy looks identical to your period. And if you go to the doctor to get blood tests done, it will reveal that your hCG levels are decreasing, not increasing like they should in a viable pregnancy.

With a chemical pregnancy, your period (or the early pregnancy miscarriage) may be heavier in flow than normal. You may also notice more clots, and more severe menstrual cramping than normal. In a nutshell, your period after a chemical pregnancy may be heavier, with more clots and more cramping.

Because chemical pregnancies end in vaginal bleeding, and it occurs at around the same time as your normal period – albeit a little later than your period – most women think they just experienced a late period or a delayed period that month.

In general, most women who experience chemical pregnancies never knew they were pregnant in the first place. It’s typically only women who are trying to conceive that will notice that they experienced this very early miscarriage.

Chemical Pregnancy Causes

Chemical pregnancies occur for many of the same reasons other miscarriages occur – chromosomal abnormalities in the developing baby; abnormalities in your uterus (such as uterine fibroids or polyps), or a hormonal deficiency. A pelvic infection in the past can also contribute to causing an early miscarriage or biochemical pregnancy.

Also, because there is no way of knowing where implantation took place, it’s possible that the fertilized egg implanted in the fallopian tube. If it was the case, the ectopic pregnancy ended naturally. The body rejected the ectopic pregnancy, so it was a blessing in disguise.

It’s also possible that the chemical pregnancy occurred because of immunological implantation rejection – the woman’s immune system saw the early pregnancy as “foreign” and rejected it from the body.

There are many reasons why a chemical pregnancy occurred; you may never know why you experienced a chemical pregnancy. But take heart – it was not meant to be, and many women are able to successfully get pregnant again in the future and have a healthy baby.

Ovulation after Chemical Pregnancy

Because chemical pregnancies occur so early in gestation, it often does not affect many women’s cycles. A majority of women will go on to have normal cycles after this miscarriage. For example, some women, they will ovulate 14 days (2 weeks) after this early miscarriage (their “period”).

Other women, it’s normal to have an “off” cycle (your next period arrives earlier or later than usual) after you have a chemical pregnancy.

However, unlike with other miscarriages, you often don’t need to wait before you try again for pregnancy. (However, your doctor may advise you to wait one menstrual cycle, depending on what he feels is best in your individual medical situation.) You may want to wait, however, if you need time to grieve for the lost pregnancy.

Pregnancy after a Chemical Pregnancy

Many women who have the heartbreaking, unfortunate experience of a chemical pregnancy can go on to have a healthy pregnancy. I

f you read any mommy or pregnancy forums, you will see an overwhelming number of women who’ve had chemical pregnancies who are able to get pregnant again. There are number of moms actually fall pregnancy almost immediately after having a biochemical pregnancy/early miscarriage. So there is hope that you can have a healthy pregnancy.

Best wishes to all of you!

About the author: 7sharov-spb.ru is founder and editor of Hip Chick’s Guide to PMS, Pregnancy and Babies. She’s an expert pregnancy and women’s health blogger. She is NOT a medical doctor and does NOT offer medical advice. Connect with her on , and .

{ 6 comments… add one }
  • rita December 29, 2016, 11:46 pm

    I want to share a great testimony on this website on how great man of God who
    help me in falling pregnant,me and my husband have been trying to have a
    baby for over 9 years,but they where no luck so we decided to contact the
    family doctor and after all the test have been done,he said to us that one
    of my fallopian tube is not functioning.then one day i was in the office
    when a friend of mine who have the same problem with me, fall pregnant
    after she contacted the man of God . prophet jeremaih.she directed me to him and when i contacted
    him through is email and he did the purification on the pregnancy peyer and
    in 8weeks time i was feeling some how and i want to meet the family doctor
    who told me that i m pregnant.if you know that you have a similar problem
    like this and you want to be pregnant you can contact
    prophet jeremaih omoto via Email: or
    cell phone +5 or you can still watch him television marcylandtv

  • Susan Jacobsen July 27, 2016, 7:21 pm

    I am curious, my daughter told me that she had a biochemical pregnancy, that she missed her period in June, spotted a bit, and then again in July she has missed it, took home test positive, and then went to doctor negative on urine, and -1 on HCG, but she has not had any menstrual at all? at this point? I’m confused, I thought that she would of had a cycle upon the miscarry?, What am I missing?

  • OmAyra December 8, 2015, 5:37 am

    My Hcg level was 7 the Docter said I was pregnant cause anything higher. Then 5 is pregnancy !! I got excited . Boobs got big stomach got bump and 5 weeks later I’m bleeding . I had 2 etopics thank god I’m okey . I’ll never give up I’ll keep trying . So ladies don’t lose faith

  • Bitterswitchocolate November 22, 2015, 8:36 pm

    I check on 2 hpt and both were positive.i should be only 4 weeks by then. when to gp and did urine test but results indeterminant. 3 days later, bleeding with blood clots. so this is considered chemical pregnancy? and is there a need to follow up or just carry on with the menses like usual? and then try to conceive again?

  • July 19, 2015, 7:21 pm

    I call your ob. You only make the hcg hormone when pregnant and that’s what a pregnancy test test for. So I hate to say it but sounds like your pregnant

  • Chelsea May 30, 2015, 8:41 am

    Hi I need some advice as to whether or not I am pregnant. My husband and I had unprotected sex. 32 hours later I took minigynon30 as a substitute for ECP. I took 4 pills and took another 4 12 hours later. About 4 hours after taking the pills I threw up. I read that this would not impede with the effectiveness of the pills but to be safe I repeated this method 4 hours later after having something to eat. All 16 pills were consumed within 72 and I read that using this method is effective up to120hrs after. Three days ago I noticed I was spotting brown and took a pregnancy test which came back positive. I am now two weeks late for my period. I need help as to what I might be experiencing.

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