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foetus    
n. 胎兒

胎兒

foetus
n 1: an unborn or unhatched vertebrate in the later stages of
development showing the main recognizable features of the
mature animal [synonym: {fetus}, {foetus}]

foetus \foetus\, Foetus \F[oe]"tus\, n.
Same as {Fetus}.
[1913 Webster]


Fetus \Fe"tus\ (f[=e]"t[u^]s), n.; pl. {Fetuses}
(f[=e]"t[u^]s*[e^]z). [L. fetus, foetus, a bringing forth,
brood, offspring, young ones, cf. fetus fruitful, fructified,
that is or was filled with young; akin to E. fawn a deer,
fecundity, felicity, feminine, female, and prob. to do, or
according to others, to be.]
The young or embryo of a vertebrate animal in the womb, or in
the egg; often restricted to the later stages in the
development of viviparous and oviparous animals. showing the
main recognizable features of the mature animal, {embryo}
being applied to the earlier stages. [Written also
{f[oe]tus}.]
[1913 Webster]

FOETUS, med. jur. The unborn child. The name of embryo is sometimes given to
it; but, although the terms are occasionally used indiscriminately, the
latter is more frequently employed to designate the state of an unborn child
during the first three months after conception, and by some until
quickening. A foetus is sometimes described by the uncouth phrase of infant
in ventre sa mere.
2. It is sometimes of great importance, particularly in criminal law,
to ascertain the age of the foetus, or how far it has progressed towards
maturity. There are certain signs which furnish evidence on this subject,
the principal of which are, the size and weight, and the formation of
certain parts as the cartilages, bones, &c. These are not always the same,
much of course must depend upon the constitution and health of the mother,
and other circumstances which have an influence on the foetus. The average
length and weight of the foetus at different periods of gestation, as
deduced by Doctor Beck, from various observers, as found by Maygrier, is
here given.

����������������������������������������������������������������Ŀ
� Beck. � Maygrier. � Beck. � Maygrier. �
� � � � �
����������������������������������������������������������������Ĵ
� Length. � Weight. �
� � �
��������������������������������������������������������������������������Ĵ
�30 days. �3 to 5 lines. �10 to 12 lines.� �9 to 10 grains.�
� 2 Months�2 inches. �4 inches. �2 ounces. �5 drachms. �
� 3 do. �3� inches. �6 inches. �2 to 3 ounces. �2� ounces. �
� 4 do. �5 to 6 inches. �8 inches. �4 to 6 ounces. �7 to 8 ounces. �
� 5 do. �7 to 9 inches. �10 inches. �9 to 10 ounces.�16 ounces. �
� 6 do. �9 to 12 inches. �12 inches. �1 to 2 pounds. �2 pounds. �
� 7 do. �12 to 14 inches.�14 inches. �2 to 3 pounds. �3 pounds. �
� 8 do. �16 inches. �16 inches. �3 to 4 pounds. �4 pounds. �
����������������������������������������������������������������������������

3. The discordance apparent between them proves that the observations
which have been made, are only an approximation to truth.
4. It is proper to remark that the Paris pound poids de marc, which was
the weight used by Maygrier, differs from avoirdupois weight used by Dr.
Beck. The pound poids de marc, of sixteen ounces, contains 9216 Paris
grains, whilst the avoirdupois contains only 8532.5 Paris grains. The Paris
inch is 1.065977 English inch. Vide, generally, 1 Beck's Med. Jur. 239; 2
Dunglison's Human Physiology, 391; Ryan's Med. Jur. 137; 1 Chit. Med. Jur.
403; I Briand, Med. Leg. prem. partie, c. 4, art. 2; and the articles Birth;
Dead Born; Foeticide; In ventre sa mere; infanticide; Life; and Quick with
child.

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  • Fetus - Wikipedia
    A fetus or foetus ( ˈ f iː t ə s ; pl : fetuses, foetuses, rarely feti or foeti) is the unborn offspring of a viviparous animal that develops from an embryo [1] Following the embryonic stage, the fetal stage of development takes place Prenatal development is a continuum, with no clear defining feature distinguishing an embryo from a fetus However, in general a fetus is characterized by
  • Fetal development by week: Your baby in the womb - BabyCenter
    At the start of this week, you ovulate Your egg is fertilized 12 to 24 hours later if a sperm penetrates it Over the next several days, the fertilized egg (called a zygote) will start dividing into multiple cells as it travels down the fallopian tube, enters your uterus, and starts to burrow into the uterine lining Read about fertilization
  • FOETUS | English meaning - Cambridge Dictionary
    FOETUS definition: 1 a young human being or animal before birth, after the organs have started to develop: 2 a UK… Learn more
  • Fetus - Definition, Stages and Development | Biology Dictionary
    Fetus Definition Fetal development occurs between the embryonic stage of development and birth in humans This stage begins after 11 weeks of gestation, when the embryo begins to exhibit human characteristics, and lasts until birth
  • Fetal Development: Week-by-Week Stages of Pregnancy - Cleveland Clinic
    Fetal development is how a fetus grows during pregnancy It begins at conception and ends at birth Many changes occur to the fetus and the pregnant person in this time
  • Embryo vs. Fetus: What’s the Difference? - Healthline
    With each week of pregnancy, your baby-to-be is developing in leaps and bounds In the early stages, they are called a zygote They then progress to an embryo, fetus, and finally, baby You might
  • Fetal development: The first trimester - Mayo Clinic
    You're pregnant Congratulations! As your pregnancy goes on, you may wonder how your baby is growing and developing Use this information to follow along with what's happening week by week during the first 12 weeks of pregnancy, called the first trimester It might seem odd, but you're actually not
  • Fetus | Growth, Development, Nutrition | Britannica
    fetus, the unborn young of any vertebrate animal, particularly of a mammal, after it has attained the basic form and structure typical of its kind A brief treatment of the fetus follows For more information on the human fetus, see pregnancy Biologists arbitrarily speak of the earliest stages of development of the fertilized egg as the embryonic period, which ends when the external form of
  • Fetus Definition and Examples - Biology Online Dictionary
    Foetus (UK, Ireland, Commonwealth nations) The plural of the fetus (foetus) is fetuses or feti Watch this vid about fetus development: Development in Humans Since the fetus is a common term for the post-embryonic stage in many mammals, we will be restricted to the idea of human fetus development in this article Here, we discuss the different
  • What is the difference between an embryo, a fetus, and a baby? - Clue
    What is an embryo? Fertilization occurs when a sperm cell enters a mature oocyte (egg cell) (2) The DNA from these two cells combine, forming a zygote (2) The zygote repeatedly divides into smaller embryonic cells





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