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  2. Implantation (embryology) - Wikipedia

    en.wikipedia.org/wiki/Implantation_(embryology)

    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.

  3. Timeline of human prenatal development - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_human_prenatal...

    The embryo hatches from its protein shell (zona pellucida) and performs implantation onto the endometrial lining of the mother's uterus. (day 5–6 of fertilization. [1]) If separation into identical twins occurs, 1/3 of the time it will happen before day 5. [2]

  4. Everything you need to know about when and how implantation ...

    www.aol.com/everything-know-implantation-occurs...

    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 ...

  5. Signs and symptoms of pregnancy - Wikipedia

    en.wikipedia.org/wiki/Signs_and_symptoms_of...

    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. [20] Leg cramps typically last only for a few seconds, however they can be extremely painful and last for minutes. [ 21 ]

  6. Luteal phase - Wikipedia

    en.wikipedia.org/wiki/Luteal_phase

    Ovulation occurs ~35 hours after the beginning of the LH surge or ~10 hours following the LH surge. Several days after ovulation, the increasing amount of estrogen produced by the corpus luteum may cause one or two days of fertile cervical mucus, lower basal body temperatures, or both. This is known as a "secondary estrogen surge".

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  8. Human fertilization - Wikipedia

    en.wikipedia.org/wiki/Human_fertilization

    Autoimmune disorders can lead to complications in implantation of the egg in the uterus, which may be the immune system's attack response to an established embryo on the uterine wall. [36] Cancer ultimately affects fertility and may lead to birth defects or miscarriages. Cancer severely damages reproductive organs, which affects fertility. [36]

  9. Ensoulment - Wikipedia

    en.wikipedia.org/wiki/Ensoulment

    Other religious views are that ensoulment happens at the moment of conception; or when the child takes the first breath after being born; [1] [2] at the formation of the nervous system and brain; at the first detectable sign of brain activity; or when the fetus is able to survive independently of the uterus . [3]