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  2. Immaculate Conception - Wikipedia

    en.wikipedia.org/wiki/Immaculate_Conception

    The Immaculate Conception is the belief that the Virgin Mary was free of original sin from the moment of her conception. [1] It is one of the four Marian dogmas of the Catholic Church. [2]

  3. Timeline of human prenatal development - Wikipedia

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

    Gestational age: 3 weeks and 0 days until 3 weeks and 6 days old. 22–28 days from last menstruation. Embryonic age: Week nr 2. 1 week old. 8–14 days from fertilization. Trophoblast cells surrounding the embryonic cells proliferate and invade deeper into the uterine lining. They will eventually form the placenta and embryonic membranes.

  4. Gestational age - Wikipedia

    en.wikipedia.org/wiki/Gestational_age

    Gestational age is contrasted with fertilization age which takes the date of fertilization as the start date of gestation. There are different approaches to defining the start of a pregnancy. This definition is unusual for saying that women become "pregnant" two weeks before having sex. The definition of pregnancy and the calculation of gestational age are also relevant in the context of the ...

  5. Age and female fertility - Wikipedia

    en.wikipedia.org/wiki/Age_and_female_fertility

    Learn how age affects female fertility, the risks and benefits of delaying pregnancy, and the latest research on reproductive technologies.

  6. Prenatal development - Wikipedia

    en.wikipedia.org/wiki/Prenatal_development

    Prenatal development (from Latin natalis 'relating to birth') involves the development of the embryo and of the fetus during a viviparous animal 's gestation. Prenatal development starts with fertilization, in the germinal stage of embryonic development, and continues in fetal development until birth. In human pregnancy, prenatal development is ...

  7. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    The estimated date of delivery (EDD), also known as expected date of confinement, [1] and estimated due date or simply due date, is a term describing the estimated delivery date for a pregnant woman. [2] Normal pregnancies last between 38 and 42 weeks. [3] Children are delivered on their expected due date about 4% of the time.

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