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  2. Timeline of human prenatal development - Wikipedia

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

    Gestational age: 6 weeks and 0 days until 6 weeks and 6 days old. 43–49 days from last menstruation. Embryonic age: Week nr 5. 4 weeks old. 29–35 days from fertilization. The embryo measures 8 mm (0.31 in) in length and weighs about 1 gram. [4] Optic vesicles and optic cups form the start of the developing eye. Nasal pits form.

  3. Vanishing twin - Wikipedia

    en.wikipedia.org/wiki/Vanishing_twin

    Vanishing twin. A fetus papyraceus shown with its umbilical cord next to the placenta of its dichorionic diamniotic twin. Specialty. Obstetrics and gynaecology. A vanishing twin, also known as twin resorption, is a fetus in a multigestation pregnancy that dies in utero and is then partially or completely reabsorbed. [1][2] In some instances ...

  4. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    Full-term: 39 weeks and 0 days through 40 weeks and 6 days; Late-term: 41 weeks and 0 days through 41 weeks and 6 days; Post-term: greater than or equal to 42 weeks and 0 days; Naegele's rule is a standard way of calculating the due date for a pregnancy when assuming a gestational age of 280 days at childbirth. The rule estimates the expected ...

  5. Twin-to-twin transfusion syndrome - Wikipedia

    en.wikipedia.org/wiki/Twin-to-twin_transfusion...

    The use of endoscopic instruments allows for short recovery time. This procedure has been associated with 85% survival rate of at least one fetus, with a 6–7% risk of cerebral palsy and average delivery occurring at 32–33 weeks' gestation. [5] Twin anemia–polycythemia sequence (TAPS) may occur after laser surgery for TTTS (post-laser form ...

  6. Signs and symptoms of pregnancy - Wikipedia

    en.wikipedia.org/.../Signs_and_symptoms_of_pregnancy

    Carpal tunnel syndrome – Carpal tunnel syndrome can occur in up to 70% of pregnant women and typically has a benign course. [16][17] It manifests as pain, numbness, and tingling in the thumb, index finger, middle finger and the thumb side of the ring finger. [18] The symptoms of carpal tunnel syndrome during pregnancy are usually mild and do ...

  7. Multiple birth - Wikipedia

    en.wikipedia.org/wiki/Multiple_birth

    A study in 2013 involving 106 participating centers in 25 countries came to the conclusion that, in a twin pregnancy of a gestational age between 32 weeks 0 days and 38 weeks 6 days, and the first twin is in cephalic presentation, planned Cesarean section does not significantly decrease or increase the risk of fetal or neonatal death or serious ...

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

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

    Pregnancy Symptoms Week 1. It's a bit of a mind-bender, but you aren't actually pregnant during what doctors call "week one" of pregnancy. Instead, week one starts on the first day of your last ...

  9. Superfetation - Wikipedia

    en.wikipedia.org/wiki/Superfetation

    Superfetation. Superfetation (also spelled superfoetation – see fetus) is the simultaneous occurrence of more than one stage of developing offspring in the same animal. [1][2][3] In mammals, it manifests as the formation of an embryo from a subsequent menstrual cycle, while another embryo or fetus is already present in the uterus.