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  2. Placental expulsion - Wikipedia

    en.wikipedia.org/wiki/Placental_expulsion

    As the fetal hypothalamus matures, the activation of the hypothalamic–pituitary–adrenal (HPA) axis initiates labor through two hormonal mechanisms. The end pathway of both mechanisms lead to contractions in the myometrium, a mechanical cause of placental separation, which is due to the sheer force and contractile and involutive changes that occur within the uterus, distorting the placentome.

  3. Gravidity and parity - Wikipedia

    en.wikipedia.org/wiki/Gravidity_and_parity

    [8] [9] A female who has never carried a pregnancy beyond 20 weeks is nulliparous and is called a nullipara or para 0. [10] A female who has given birth once is primiparous and is referred to as a primipara or primip. A female who has given birth two, three, or four times is multiparous and is called a multip.

  4. Ordinal numeral - Wikipedia

    en.wikipedia.org/wiki/Ordinal_numeral

    Ordinal numbers may be written in English with numerals and letter suffixes: 1st, 2nd or 2d, 3rd or 3d, 4th, 11th, 21st, 101st, 477th, etc., with the suffix acting as an ordinal indicator. Written dates often omit the suffix, although it is nevertheless pronounced. For example: 5 November 1605 (pronounced "the fifth of November ...

  5. Parthenogenesis - Wikipedia

    en.wikipedia.org/wiki/Parthenogenesis

    Parthenogenesis (/ ˌ p ɑːr θ ɪ n oʊ ˈ dʒ ɛ n ɪ s ɪ s,-θ ɪ n ə-/; [1] [2] from the Greek παρθένος, parthénos, 'virgin' + γένεσις, génesis, 'creation' [3]) is a natural form of asexual reproduction in which the embryo develops directly from an egg without need for fertilization.

  6. Meconium - Wikipedia

    en.wikipedia.org/wiki/Meconium

    No meconium is passed, and abdominal distension and vomiting appear soon after birth. About 20% of cases of cystic fibrosis present with meconium ileus, while approximately 20% of one series of cases of meconium ileus did not have cystic fibrosis. [3] The presence of meconium ileus is not related to the severity of the cystic fibrosis. [4]

  7. Live birth (human) - Wikipedia

    en.wikipedia.org/wiki/Live_birth_(human)

    The definition of the term "live birth" was created by the World Health Organization in 1950, and is chiefly used for public health and statistical purposes. However, the term "live birth" was in common use long before 1950. [2] In the United States, the term "born alive" is defined by federal law [3] known as the born alive rule.

  8. Estimated date of delivery - Wikipedia

    en.wikipedia.org/wiki/Estimated_date_of_delivery

    281 days after LMP with a standard deviation of 13 days, was the result of a population-based study of 427,581 singleton births in Sweden. [16] 281 days after LMP for first-time mothers and 280 days for all others were the medians found by a 1995 American study of 1,970 spontaneous births. Standard deviation was 7–9 days.

  9. Birth - Wikipedia

    en.wikipedia.org/wiki/Birth

    After birth the umbilical cord is clamped and cut, the baby starts to breathe air, and blood from the right ventricle starts to flow to the lungs for gaseous exchange and oxygenated blood returns to the left atrium, which is pumped into the left ventricle, and then pumped into the main arterial system. As a result of these changes, the blood ...