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  2. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    About 80% of miscarriages occur in the first 12 weeks of pregnancy. The underlying cause in about half of cases involves chromosomal abnormalities. Stillbirth is defined as fetal death after 20 or 28 weeks of pregnancy, depending on the source. It results in a baby born without signs of life.

  3. Gravidity and parity - Wikipedia

    en.wikipedia.org/wiki/Gravidity_and_parity

    When reported, the "abortions" number refers to the total number of spontaneous or induced abortions and miscarriages, including ectopic pregnancies, prior to 20 weeks. If a fetus is aborted after 20 weeks, spontaneously or electively, then it is counted as a premature birth and P will increase but L will not.

  4. Maternal physiological changes in pregnancy - Wikipedia

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

    Some degree of weight gain is expected during pregnancy. The enlarging uterus, growing fetus, placenta, amniotic fluid, normal increase in body fat, and increase in water retention all contribute weight gain during pregnancy. The amount of weight gain can vary from 5 pounds (2.3 kg) to over 100 pounds (45 kg).

  5. Here's what pregnancy actually looks like before 10 weeks ...

    www.aol.com/lifestyle/heres-pregnancy-actually...

    Women’s health expert Dr. Jennifer Wider tells Yahoo Life that “weeks 5 to 9 is the early time period in a pregnancy. At 5 weeks, the embryo is a mass of cells with a developing neural tube ...

  6. Gestation - Wikipedia

    en.wikipedia.org/wiki/Gestation

    Gestation. Drawing of a fetus in utero. Gestation is the period of development during the carrying of an embryo, and later fetus, inside viviparous animals (the embryo develops within the parent). [1] It is typical for mammals, but also occurs for some non-mammals. Mammals during pregnancy can have one or more gestations at the same time, for ...

  7. Complications of pregnancy - Wikipedia

    en.wikipedia.org/wiki/Complications_of_pregnancy

    Miscarriage is the loss of a pregnancy prior to 20 weeks. In the UK, miscarriage is defined as the loss of a pregnancy during the first 23 weeks. Approximately 80% of pregnancy loss occurs in the first trimester, with a decrease in risk after 12 weeks gestation.

  8. Timeline of human prenatal development - Wikipedia

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

    A 10mm embryo from an ectopic pregnancy, still in the oviduct. This embryo is about five weeks old (or from the seventh week of menstrual age). Week 6. Gestational age: 5 weeks and 0 days until 5 weeks and 6 days old. 36–42 days from last menstruation. Embryonic age: Week nr 4. 3 weeks old. 22–28 days from fertilization.

  9. Pregnancy rate - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_rate

    Pregnancy rate. Pregnancy rate is the success rate for getting pregnant. It is the percentage of all attempts that leads to pregnancy, with attempts generally referring to menstrual cycles where insemination or any artificial equivalent is used, which may be simple artificial insemination (AI) or AI with additional in vitro fertilization (IVF).

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