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  2. Repeated implantation failure - Wikipedia

    en.wikipedia.org/wiki/Repeated_implantation_failure

    Repeated implantation failure (RIF) is the repeated failure of the embryo to implant onto the side of the uterus wall following IVF treatment. [1] Implantation happens at 6–7 days after conception and involves the embedding of the growing embryo into the mothers uterus and a connection being formed. [2]

  3. Human embryonic development - Wikipedia

    en.wikipedia.org/wiki/Human_embryonic_development

    [11]: 165 This is a horseshoe-shaped area near to the head of the embryo. By day 19, following cell signalling, two strands begin to form as tubes in this region, as a lumen develops within them. These two endocardial tubes grow and by day 21 have migrated towards each other and fused to form a single primitive heart tube, the tubular heart.

  4. Postpartum physiological changes - Wikipedia

    en.wikipedia.org/wiki/Postpartum_physiological...

    After birth, the fundus contracts downward into the pelvis one centimeter each day. After two weeks the uterus will have contracted and return into the pelvis. [9] The sensation and strength of postpartum uterine contractions can be stronger in women who have previously delivered a child or children. [10]

  5. Prenatal development - Wikipedia

    en.wikipedia.org/wiki/Prenatal_development

    The embryo becomes embedded in the endometrium in a process called implantation. In most successful pregnancies, the embryo implants 8 to 10 days after ovulation. [7] The embryo, the extra-embryonic membranes, and the placenta are collectively referred to as a conceptus, or the "products of conception".

  6. Implantation (embryology) - Wikipedia

    en.wikipedia.org/wiki/Implantation_(embryology)

    Implantation is the first stage of gestation, and, when successful, the female is considered to be pregnant. [3] An implanted embryo is detected by the presence of increased levels of human chorionic gonadotropin (hCG) in a pregnancy test. [3] The implanted embryo will receive oxygen and nutrients in order to grow.

  7. Embryo transfer - Wikipedia

    en.wikipedia.org/wiki/Embryo_transfer

    Embryo transfer refers to a step in the process of assisted reproduction in which embryos are placed into the uterus of a female with the intent to establish a pregnancy.This technique - which is often used in connection with in vitro fertilization (IVF) - may be used in humans or in other animals, in which situations and goals may vary.

  8. Placental expulsion - Wikipedia

    en.wikipedia.org/wiki/Placental_expulsion

    In the seventh month of pregnancy, the MHC-I complexes increase in the interplacentomal arcade reduces the bi- and tri-nucleate cells, a source of immune suppression in pregnancy. By the ninth month, the endometrial lining has thinned (due to loss of trophoblast giant cells) which exposes the endometrium directly to the fetal trophoblast ...

  9. Timeline of human prenatal development - Wikipedia

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

    (day 20 of fertilization. [1]) Primitive heart tube is forming. Vasculature begins to develop in embryonic disc. (day 20 of fertilization. [1]) Embryo at 4 weeks after fertilization. [3] 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).