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  2. A week-by-week guide to common pregnancy symptoms - AOL

    www.aol.com/news/week-week-guide-common...

    Second Trimester Pregnancy Symptoms. Raise a mocktail! For many women, symptoms of nausea and vomiting start to subside around the start of the second trimester, or at least sometime during the ...

  3. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    The third trimester is defined as starting, between the beginning of week 28 (27 weeks + 0 days of GA) [36] or beginning of week 29 (28 weeks + 0 days of GA). [4] It lasts until childbirth . Timeline of pregnancy, including (from top to bottom): Trimesters, embryo/fetus development, gestational age in weeks and months, viability and maturity stages

  4. In pregnancy, the brain changes in remarkable ways, a new ...

    www.aol.com/pregnancy-brain-changes-remarkable...

    Additionally, scientists found noteworthy increases in white matter located deeper in the brain, which they reported peaked in the second trimester and returned to normal pre-pregnancy levels ...

  5. Study shows how a woman's brain reorganizes during pregnancy

    www.aol.com/news/study-shows-womans-brain...

    Researchers said on Monday they have for the first time mapped the changes that unfold as a woman's brain reorganizes in response to pregnancy, based on scans carried out 26 times starting three ...

  6. Maternal physiological changes in pregnancy - Wikipedia

    en.wikipedia.org/wiki/Maternal_physiological...

    During pregnancy the plasma volume increases by 40-50% and the red blood cell volume increases only by 20–30%. [20] These changes occur mostly in the second trimester and prior to 32 weeks gestation. [22] Due to dilution, the net result is a decrease in hematocrit or hemoglobin, which are measures of red blood cell concentration.

  7. Late termination of pregnancy - Wikipedia

    en.wikipedia.org/wiki/Late_termination_of_pregnancy

    Definition. A late termination of pregnancy often refers to an induced ending of pregnancy after the 20th week of gestation, i.e. after a fetal age (time since conception) of about 18 weeks. The exact point when an abortion is considered late-term, however, is not clearly defined.