multiple birth (redirected from Multiple animal births)

birth (berth) a coming into being; act or process of being born.

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complete birth  entire separation of the infant from the maternal body (after cutting of the umbilical cord).

multiple birth  the birth of two or more offspring produced in the same gestation period.

postterm birth  birth of an infant at or after 42 completed weeks (294 days) of gestation.

premature birth , preterm birth birth of an infant before 37 completed weeks (259 days) of gestation.

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birth

a coming into being; the act or process of being born. See also parturition.

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birth canal

the canal through which the fetus passes in birth; comprising the uterus, cervix, vagina and vulva.

birth cohort

see cohort.

birth control

a term rarely used in dealing with animals. Instead see population control, contraception.

birth defects

see congenital defects.

birth difficulties

dystocia.

birth injury

occurs to the fetus during birth. Includes rib fracture and meningeal hemorrhage.

birth interval

the interval between succeeding parturitions. See also calving interval.

multiple birth

the birth of two or more offspring produced in the same gestation period.

birth order

the chronological order of births in a multiple birth. May have significance in causing stillbirths if the intervals between births are prolonged because of inertia.

premature birth

expulsion of the fetus from the uterus before termination of the normal gestation period, but after independent existence has become a possibility. In humans prematurity is defined as a pregnancy of less than 37 weeks in a pregnancy normally lasting 40 weeks.

birth process

comprises maturation of the fetus, relaxation of the bony pelvis and associated ligaments, softening and relaxation of the cervix, vagina, vulva and perineum, correct disposition of the fetus, contractions of the uterine myometrium and finally the only component under voluntary control, contraction of the abdominal muscles.

birth rate

the number of births during one year for the total population (crude birth rate), for the female population (refined birth rate), or for the female population of reproductive age (true birth rate). Not a term much used with reference to animals. See calving, lambing rate.

birth size

stature, including height at withers, crown to tail head length at birth.

birth weight

the weight at birth. A significant determinant of survival in any species and of the occurrence of dystocia. See also prolonged gestation.

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multiple

manifold; occurring in various parts of the body at once.

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multiple alleles

see allele.

multiple birth

more than one offspring in a gestation and parturition.

multiple causation

a disease in which a combination, or alternative combinations, of causes, are required to produce it. Called also multifactorial etiology.

multiple-crush

surgical instruments, e.g. heavy duty emasculators, ecraseurs in which each jaw has more than one crushing surface, mounted one behind the other, each successive surface coming into contact with its counterpart as increasing pressure is applied to the handles of the instrument.

multiple endochondromas

see endochromatosis.

multiple fission

a method of reproduction in protozoa. See schizogony.

multiple infection

simultaneous infection with more than one virus or a combination of virus and bacteria may be caused by one agent lowering resistance to the other. There may be synergism between the agents.

multiple least squares regression

the major method of analysis used to sort through a large number of potential risk factors permitting the examination of one factor while the other factors in the regression equation are held mathematically constant.

multiple limb defects

patients with more than one congenital limb defect.

multiple myeloma

see multiple myeloma.

multiple organ dysfunction syndrome

in critical care medicine, a state in which intervention is required to maintain homeostasis. Called also MODS.

multiple ovulation

an important feature in the technique of embryo transfer. See superovulation.

multiple pregnancies

twins, triplets and more in usually uniparous species.

multiple regression

an analytical method which determines the relationship between a dependent variable and one or more independent variables.

multiple risk

situations in which more than one risk factor for a disease is present and their combined presence contributes to an increased risk.

multiple suckling

when a cow accepts more calves to suckle than her own; a system for foster-rearing of orphan or purchased calves.

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multiple birth

Reproduction medicine A pregnancy resulting in birth of ≥ 2 infants. See Clomifen, Higher multiple.