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Implantation bleeding. "Implantation bleeding is thought to be light bleeding that occurs about 10 days after ovulation," says Washington, D.C.-based ob-gyn Dr. Cordelia Nwankwo. This type of ...
Bleeding and spotting are common during the luteal phase of the menstrual cycle, and early stages of pregnancy, but are unrelated to implantation. Implantation bleeding occurs between 7 and 14 days after fertilization, [57] and is a small amount of light vaginal bleeding or spotting that can occur in early pregnancy due to the blastocyst ...
Implantation bleeding may be confused with a regular period. [3] [4] Heavy vaginal bleeding in the first trimester or bleeding associated with pain, may be a sign of a complication, such as a miscarriage or an ectopic pregnancy, that would need to be assessed by a healthcare provider. [5]
Fertilization usually occurs about two weeks before the next expected menstrual period. A third point in time is also considered by some people to be the true beginning of a pregnancy: This is time of implantation, when the future fetus attaches to the lining of the uterus. This is about a week to ten days after fertilization. [44]
Typically the egg cell is not released or picked up at ovulation, but fertilized within the ovary where the pregnancy implants. [1] [2] [3] Such a pregnancy usually does not proceed past the first four weeks of pregnancy. [3] An untreated ovarian pregnancy causes potentially fatal intra-abdominal bleeding and thus may become a medical emergency.
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Bleeding which occurs before 24 weeks is known as early pregnancy bleeding. Causes of bleeding before and during childbirth include cervicitis, placenta previa, placental abruption and uterine rupture. [4] [5] Causes of bleeding after childbirth include poor contraction of the uterus, retained products of conception, and bleeding disorders. [4]
The most common site of the extrauterine pregnancy is the fallopian tube. However, other sites of implantation include the cervix, ovary, and abdomen. [3] Although heterotopic pregnancies were once thought to be a rare phenomenon, the incidence has increased due to the increasing use of assisted reproductive technologies. [3]