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  2. Why Is My Period Late? 6 Possible Reasons (Besides the ...

    www.aol.com/lifestyle/why-period-6-possible...

    Jacobson explains, “During the first two years of menarche (the age of a woman’s first menstrual period), the positive feedback response to estrogen, which allows ovulation, can cause ...

  3. What the age you got your period says about you - AOL

    www.aol.com/article/lifestyle/2016/12/07/what...

    Girls have started getting their first period earlier than in the past, so now it's considered "normal" for girls to get their period between 9 and 14 years old, says Maureen Whelihan, M.D., an ob ...

  4. Signs and symptoms of pregnancy - Wikipedia

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

    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]

  5. Early Age of First Period Linked to Obesity, Poor Diet, and ...

    www.aol.com/early-age-first-period-linked...

    The findings, published May 29 in JAMA Network Open, indicate the average age at menarche — an individual’s first period — decreased from 12.5 years for those born 1950–1969 to 11.9 years ...

  6. Menarche - Wikipedia

    en.wikipedia.org/wiki/Menarche

    Menarche (/ m ə ˈ n ɑːr k i / mə-NAR-kee; from Ancient Greek μήν (mēn) 'month' and ἀρχή (arkhē) 'beginning') is the first menstrual cycle, or first menstrual bleeding, in female humans. From both social and medical perspectives, it is often considered the central event of female puberty, as it signals the possibility of fertility.

  7. Flashbulb memory - Wikipedia

    en.wikipedia.org/wiki/Flashbulb_memory

    The term flashbulb memory was coined by Brown and Kulik in 1977. [2] They formed the special-mechanism hypothesis, which argues for the existence of a special biological memory mechanism that, when triggered by an event exceeding critical levels of surprise and consequentiality, creates a permanent record of the details and circumstances surrounding the experience. [2]

  8. First Period - Wikipedia

    en.wikipedia.org/wiki/First_Period

    The Fairbanks House in Dedham, Massachusetts, the oldest still-standing timber structure in North America, was built in c. 1637. First Period is an American architecture style originating between approximately 1626 and 1725, used primarily by British colonists during the settlement of the British colonies of North America, particularly in Massachusetts and Virginia.

  9. Proterozoic - Wikipedia

    en.wikipedia.org/wiki/Proterozoic

    The Proterozoic Eon was a very tectonically active period in the Earth's history. The late Archean Eon to Early Proterozoic Eon corresponds to a period of increasing crustal recycling, suggesting subduction. Evidence for this increased subduction activity comes from the abundance of old granites originating mostly after 2.6 Ga. [14]