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Implantation Calculator

Implantation Calculator

Enter your ovulation date and the tool will estimate the exact date of implantation happening by considering the date entered.

Do you know your ovulation date?

Ovulation Date

Your Last Period

Menstrual Cycle Length

Fertility Treatment

IVF Transfer Day (Optional)

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An online implantation calculator helps you to explore when does implantation happen based on your last menstrual period or ovulation date. This DPO calculator provides a detailed table with the probability of implantation and Days past ovulation (DPO). In the following text, you can get a better understanding of when does implantation occurs, DPO, and much more.

What is Implantation?

Implantation is the process in which the embryo attaches to the uterine lining. This attachment to the uterine lining allows the embryo to obtain oxygen and nutrients from the mother and continue the growth until it becomes a fetus.
After completion, the embryo begins to produce the hCG hormone. It is a hormone that makes a positive pregnancy test result. HCG plays an important role in the first trimester. When you are not pregnant, the drop in hormone progesterone causes your menstrual period to start. But the presence of hCG sends signals for progesterone production to continue, and the uterine lining is maintained throughout pregnancy.

When Does Implantation Occur?

Implantation is an important step in the conception process. This is the moment when the embryo attaches to the wall of the uterus. After implantation, you may see bleeding or light spots, which is a good sign for you to know the implantation time.
Implantation time is short, so sperm must be ready to welcome the egg. If the sperm arrives too early or too late, it will not be able to form an embryo. Ovulation is the release of egg cells that occurs about 12-14 days after the first day of your menstrual period. Implantation occurs 6-12 days after ovulation.
Calculating your ovulation date, menstrual cycle, and implantation can be very confusing. The implantation calculator will help you solve this problem. The calculator will also help you understand that the bleeding you find is not caused by a miscarriage or the next menstrual cycle but due to implantation.

However, an online Ovulation Calculator estimates when you may be ovulating to find your most fertile days.

What are the Implantation Symptoms and Signs?

Although many women cannot feel implantation, a small percentage of women may experience bleeding early in pregnancy. In addition, other symptoms of implantation may also occur such as:

  • Cramps
  • Mood swings
  • Headache
  • Swelling or chest tenderness

When is Implantation bleeding does usually not look like a regular menstrual cycle. It is usually pink or brown in color and occurs about nine days after ovulation when the egg is attached to the wall of the uterus.

How to Calculate Implantation Date?

If you are trying to have a baby, then you probably know that many things must happen to your body before you get a positive pregnancy test. The process is as follows:

• Your body will release a mature egg (ovulation)

• Sperm – whether in your body (because the babies can live in the uterus for up to 5-6 days) or just making their entrance in the hours just before ovulation.

• One sperm travel through the fallopian tube to reach the egg to fertilize the egg. (Conception)

• That fertilized egg travels from the fallopian tubes to the uterus.

• Now, fertilized egg implants in the uterine wall. (implantation)

• Some of these steps are happening immediately, such as conception, while other steps may take a day (ovulation) or even a week.

Let us calculate how long does implantation takes.

When I Know My Ovulation Date:

If you know the ovulation date, then the implantation calculator can calculate the implantation date like this:

Ovulation date + 9 days = implantation date

When I Know the Date of the First Day:

Firstly, consider the average length of your cycle. Then, the implantation bleeding calculator uses this formula to calculate the approximate date of ovulation:

Cycle length – 14 days = cycle days before ovulation

This calculation is used because the luteal phase is usually around 14 days, even if your cycle is more than 28 Days.
If you want to know how long does implantation take, then we can see an example:

If you have a 30-day cycle, you may ovulate around the 16th day of the cycle. If you have a 34-day cycle, you may ovulate around the 20th day of the cycle.

Then, the Implantation calculator adds these days to the first day of the last menstrual period. Then, use this date as the “known” ovulation date and use this ovulation formula:

Ovulation date + 9 days = implantation date

However, An Online Pregnancy Calculator will help to estimates your expected due date and provides you a complete pregnancy schedule.

Difference Between Menstrual Period And Implantation Bleeding:

When the fertilized egg implants into the uterus wall lining, implantation bleeding occurs about 7-14 days past ovulation (DPO). In this case, a small part of the uterine lining can be distributed or released, causing bleeding. This implantation bleeding is usually dark brown or pink. The menstrual blood is often vibrant and bright red. It takes time to shift from the uterine wall to the vagina during the implantation process, so the color changes from red to pink or dark brown because it is no longer fresh. However, if the bleeding is lighter at first and becomes worse later, the bleeding will continue for 4-7 days, then this is definitely your menstrual cycle.

There will be implant bleeding about 10 days past ovulation. Therefore, if you find pink or dark brown spots on days 22 to 25 of LMP, then it may be implantation bleeding. Although menstruation usually occurs 14 days past ovulation (DPO). Women may experience mild low-intensity abdominal cramps during implantation bleeding, and menstrual cramps will become stronger and more intense.

How does Implantation Calculator Works?

An online implantation bleeding calculator helps you to explore your implantation date by following these guidelines:


  • If you know your ovulation, then put your ovulation date.
  • On the other side, if you don’t know your ovulation date, then substitute your last period date and menstrual cycle length.
  • Then, put IVF transfer day. (Optional)
  • Hit the “Calculate Implantation” button.


  • The DPO calculator displays an implantation calendar in the form of a table with Ovulation date, Days past ovulation (DPO), and probability of implantation.


When to Take a Home Pregnancy Test?

After the implantation is complete, your body begins to produce hCG. However, it has to build up a bit before the home pregnancy test detects this. So it is best to wait at least 3-4 days after implantation to check. Most women do this about 5-6 days after implantation. But we understand that you spend another day without knowing that it is excruciating when you want a child. If you are tested before your missed period, all you know is that you may get a negative result and still be pregnant. Give your hCG time to build and repeat the test after few days.

How long after implantation can I get a positive pregnancy test?

It is most accurate to have a home pregnancy test on or after the first day of your missed period, usually 12-14 days after ovulation. The pregnancy test detects the presence of a hormone called human chorionic gonadotropin or hCG that is unique to pregnancy. Your body will not start to produce hCG before the implantation is complete. It may be between 8 and 10 days after conception. Once this happens, the hormone doubles approximately every 48 hours.

Can I take a pregnancy test during implantation bleeding?

Although it is safe to take a pregnancy test during implantation bleeding, you may not get accurate results. This is because the hormone level (hCG) determines the pregnancy test has not yet reached a sufficient level. Therefore, you should take the test when your period is due.

What does DPO mean?

Day Post Ovulation (DPO) is a key term every female need to be aware of. It’s only mom who has a 28-day textbook of the menstrual cycle in which the ovulation occurs on the 14th Day. Every mom who has enough knowledge about DPO, wants to know how many DPO am I? This is why women usually have to use some tools such as prediction kits, ultrasound scans, and BBT charts to pinpoint ovulation dates.


Use this online implantation calculator for how many days after ovulation does implantation occurs. It will also estimate when you can take the pregnancy test to be positive and when you may have symptoms of implantation.


From the source of Wikipedia: Implantation (human embryo), Implantation window, Adaptation of uterus, Predecidualization, Decidualization, Trigger, Parts of decidua, Decidua throughout pregnancy.

From the source of Healthline Parenthood: Possible signs of implantation, Bleeding, Cramps, Discharge, Bloating, Tender breasts, Nausea.

From the source of Britannica: Reproduction physiology, Pinopodes, Function in implantation, Function during implantation, Adaptation of secretions, Nourishment, Growth and implantation.