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On average, implantation occurs about 8-10 days after ovulation, but it can happen as early as six and as late as 12. This means that for some women, implantation can occur around cycle day 20 ...
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 penetrating the lining of the uterus during implantation.
Common implantation symptoms include cramping and spotting, or very light bleeding, but those same signs can also be indicative of a normal menstrual cycle.
Leg cramps – Leg cramps (involuntary spasms of the calf muscles) can affect between 30% and 50% of pregnant women and most commonly occur in the last three months of pregnancy. [19] Leg cramps are a common pregnancy issue, especially in later trimesters, caused by factors like weight gain, changes in circulation, electrolyte imbalances ...
If implantation occurs, the corpus luteum will continue to produce progesterone for eight to twelve weeks, after which the placenta takes over this function. [6] In the absence of fertilization, hCG is not produced and the corpus luteum will atrophy in 10–12 days (Luteolysis or luteal regression).
If implantation does not occur, the frequency of contractions remains low; but at menstruation the intensity increases dramatically to between 50 and 200 mmHg producing labor-like contractions. [3] These contractions are sometimes termed menstrual cramps, [4] although that term is also used for menstrual pain in general.
These include cramps, breast tenderness, bloating, ... “If no implantation (of an embryo) occurs, the uterus sheds that lining, and progesterone and estrogen fall,” says Riddle. After these ...
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