6 to 10 days after ovulation About 6-12 days after ovulation and fertilization.
Implantation bleeding and spotting is among the very first of the typical pregnancy symptoms and pregnancy signs. Implantation bleeding or spotting is thought to happen when the fertilized egg attached to the lining of the uterus. Some women experience implantation bleeding while others never do.  Implantation occurs after fertilization and is the attachment of a fertilized egg to the lining of the uterus. This occurs shortly after the fertilized egg travels through the fallopian tube and enters the uterus. Implantation happens about 6-12 days after ovulation and fertilization. Another reason for some confusion between implantation bleeding and the beginning of a woman’s menstrual period is the time in a woman’s cycle when implantation bleeding occurs. Implantation bleeding usually happens about 10-14 days after ovulation and fertilization of an egg. Implantation Pregnant. In order for implantation to take place, ovulation and fertilization must occur first. Implantation happens early in the pregnancy stage after the fertilized egg (zygote) travels down the fallopian tube to the uterus and adheres to the epithelium, or uterine lining. You may be one of the few women who experience staining or spotting when implantation happens. “Implantation bleeding,” as it is called, may occur 10 to 14 days after fertilization and is normal and temporary. The attachment of the fertilized egg to the uterine lining is believed to cause the bleeding. When Implantation Bleeding Occurs. According to MayoClinic.com, implantation bleeding occurs approximately 10 to 14 days after ovulation (when the ovary releases the egg). The range of time is broad because it all depends on how quickly the egg moves down the fallopian tube and attaches to the uterus. The duration of implantation bleeding varies.  Implantation During Pregnancy. If you have conceived, then implantation, a process where the fertilized egg gets attached to the uterine wall, generally happens 7-10 days after you ovulate. However, it can happen a few days later or earlier too. Implantation typically occurs 6 to 10 days after ovulation, or day 20 to 24 of a menstrual cycle. However, it can happen a few days earlier or later. In an average 28-day cycle, ovulation occurs on day 14 with the first day of a woman's period being considered day 1 in a cycle. Implantation happens when a fertilized egg attaches itself to the uterine wall. Once fertilization occurs, the fertilized egg remains in the fallopian tube for 3 days. It then enters the uterus where it gets very close to the lining of the uterus (endometrium) and begins to invade this endometrium to implant. Consider the timing. This type of bleeding during pregnancy usually occurs 6 to 12 days after conception--close to the time when the next menstrual cycle is expected. Ask yourself when was the last time you had sex. If more than a month or two has passed, then it's unlikely that what you're seeing is implantation bleeding.  When does implantation occur is a basic question that every woman trying to get pregnant asks herself. Implantation is a process in which fertilised egg attaches itself to the uterus wall. This process occurs at the beginning of a pregnancy.  Implantation bleeding does not occur with every woman. Usually only about 30% of women will experience implantation bleeding. You will usually see implantation bleeding 4 to 7 days before your period is due if you are one of the 30%. When the egg arrives at the uterus, it will attach to the uterine wall (implantation) and start to produce the hormone that pregnancy tests detect, hCG (Human Chorionic Gonadotropin). The time required for the egg to travel to the uterus and implant is usually between 7 and 10 days.
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when does implantation in pregnancy occur