In the uterus, the morula becomes a blastocyst and eventually burrows into the uterine lining in a process called implantation. Although some women report feeling cramping or pain during the implantation process, not everyone will experience this symptom.
The symptoms of early pregnancy can vary greatly from woman to woman. Some women experience mild implantation cramping several days after ovulation, while others do not. Why might you feel cramping? To achieve pregnancy, the fertilized egg must attach to the uterine lining. Once the egg travels down the fallopian tubes and becomes a blastocyst, it begins the process of implantation in the uterus. Implanting gives the blastocyst a blood supply so that it can start growing into a fetus.
Along with cramping, you may experience what is called implantation bleeding or spotting. This usually happens 10 to 14 days after conception, around the time of your usual period. Implantation bleeding is usually much lighter than your regular menstrual period bleeding. There are many other early pregnancy symptoms you can watch for. Many of these symptoms can also be caused by hormonal changes or other conditions. This window usually includes days 6 through 10 after conception.
By this time, your estrogen levels are lowering and your uterine wall is being prepared to accept implantation by the hormone progesterone. If the blastocyst does implant into the uterine wall, your body will begin forming portions of placenta. Within two weeks, there will be enough of the human chorionic gonadotropin hCG hormone present to trigger a positive pregnancy test result. Other early pregnancy symptoms may begin to develop shortly after successful implantation.
The onset of your period will reset your menstrual cycle. The hormone hCG must build up in your body before it can show up on either a urine or blood test. If you take a pregnancy test before hCG has had time to build up, you may get a false negative. Urine tests may turn positive between 12 and 15 days after ovulation. So how long do implantation cramps last? Again, it varies, but usually you can expect that the cramping will last one to two days before wrapping up, Ruiz says.
Now that you know what they are and when to expect them, you may still be asking yourself: What do implantation cramps feel like? You may experience some discomfort that comes and goes. You may have some pain in your lower back and abdomen too. It can be hard to distinguish between the two. The difference between implantation and PMS cramping is a positive pregnancy test, Ross says.
This is perfectly fine. It has no bearing on the success of your pregnancy. The heat can help relax your uterine muscles and ease implantation cramps a bit, Ruiz says. Any kind of warm compress on your pelvis can be helpful, Lamppa says. But to be safe, make sure the heating pad is below degrees Fahrenheit, and use it on localized areas for short periods of time, say 10 to 15 minutes. Implantation cramping symptoms can also include some bleeding or spotting , which is normal, Ruiz says—but if your cramps are severe or you have really heavy bleeding, call your doctor.
In addition to implantation cramps, there are some other subtle early signs of implantation to look for. Some women will experience light bleeding, frequent urination, breast soreness, fatigue, nausea, headaches and mood swings, according to the Cleveland Clinic. Of course, decoding these early signs of pregnancy can be tricky since many of them are similar to symptoms you may experience right before your period.
So how soon after implantation can you test? Not everyone experiences implantation cramping. It usually happens 10 to 14 days after ovulation —about two to seven days before your regular period is scheduled to arrive.
Because of the timing, many women mistake implantation cramps for PMS. Implantation cramps feel like menstrual cramps, and they're mild in intensity. Some women perceive light pulling, tingling, or pricking sensations. Many women detect implantation cramping in their lower abdomen and lower back.
Sometimes cramps only manifest on one side of the body. The duration of implantation cramps also varies from person person.
Some women experience a few minor twinges, while others feel intermittent pain that comes and goes over one to three days. If you have cramping that isn't followed by your period, it may be related to implantation.
Hou notes it might be too early take a home pregnancy test , since the hormone hCG needs to reach high enough levels for detection. Home pregnancy tests are most accurate if taken after a missed period. Visit a doctor if cramps are sharp and radiate throughout your pelvis and abdomen.
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