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A fetus or foetus (/ ˈ f iː t ə s /; pl.: fetuses, foetuses, rarely feti or foeti) is the unborn mammalian offspring that develops from an embryo. [1] Following the embryonic stage , the fetal stage of development takes place.
Development before birth, or prenatal development (from Latin natalis 'relating to birth') is the process in which a zygote, and later an embryo, and then a fetus develops during gestation. Prenatal development starts with fertilization and the formation of the zygote , the first stage in embryonic development which continues in fetal ...
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.
Nasciturus pro iam nato habetur, quotiens de commodis eius agitur is a Latin legal maxim that refers to a law that grants or protects the right of a fetus to inherit property. The maxim translates, "The unborn is deemed to have been born to the extent that his own benefits are concerned".
A conceptus (from Latin: concipere, to conceive) is an embryo and its appendages (adnexa), the associated membranes, placenta, and umbilical cord; the products of conception [1] or, more broadly, "the product of conception at any point between fertilization and birth."
First attested in English in the mid-14c., the word embryon derives from Medieval Latin embryo, itself from Greek ἔμβρυον (embruon), lit. "young one", [1] which is the neuter of ἔμβρυος (embruos), lit. "growing in", [2] from ἐν (en), "in" [3] and βρύω (bruō), "swell, be full"; [4] the proper Latinized form of the Greek term would be embryum.
Definition: Relationship between the longitudinal axis of fetus and mother: longitudinal (resulting in either cephalic or breech presentation) oblique (unstable, will eventually become either transverse or longitudinal) transverse (resulting in shoulder presentation) back up; back down (indication for vertical uterine incision during cesarean ...
Fetus in fetu (or foetus in foetu) is a rare developmental abnormality in which a mass of tissue resembling a fetus forms inside the body of its twin. An early example of the phenomenon was described in 1808 by George William Young. [1] There are two hypotheses for the origin of a fetus in fetu.