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Effect of intrauterine position on conceptus development, placental and endometrial release of progesterone and estrone in vitro, and concentration of steroid hormones in fetal fluids throughout gestation in swine

Tarraf, C.G. ; Knight, J.W.

Domestic animal endocrinology, 1995-04, Vol.12 (2), p.179-187 [Periódico revisado por pares]

United States: Elsevier Inc

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Título:
Effect of intrauterine position on conceptus development, placental and endometrial release of progesterone and estrone in vitro, and concentration of steroid hormones in fetal fluids throughout gestation in swine
Autor: Tarraf, C.G. ; Knight, J.W.
Assuntos: ALLANTOIC FLUID ; Allantois - chemistry ; Amniotic Fluid - chemistry ; Amniotic Fluid - metabolism ; Androstenedione - metabolism ; ANIMAL EMBRYOS ; Animals ; BODY FLUIDS ; CERDAS ; DESARROLLO EMBRIONARIO ; DEVELOPPEMENT EMBRYONNAIRE ; EMBRIONES ANIMALES ; EMBRYON ANIMAL ; Embryonic and Fetal Development - physiology ; EMBRYONIC DEVELOPMENT ; ENDOMETRIUM ; Endometrium - metabolism ; ESTROGENOS ; Estrone - analysis ; Estrone - metabolism ; Female ; FETAL DEVELOPMENT ; FETAL WEIGHT ; FETO ; FOETUS ; GESTACION ; GESTATION ; GESTATION PERIOD ; Gestational Age ; GILTS ; Hysterectomy - veterinary ; LIQUIDE BIOLOGIQUE ; LIQUIDOS CORPORALES ; Male ; METABOLISME DES STEROIDES ; METABOLISMO DE ESTEROIDES ; OESTROGENE ; OESTROGENS ; Ovariectomy - veterinary ; PERIODE DE GESTATION ; PERIODO DE GESTACION ; PLACENTA ; Placenta - metabolism ; PREGNANCY ; Pregnancy, Animal - metabolism ; PROGESTERONA ; PROGESTERONE ; Progesterone - analysis ; Progesterone - metabolism ; Sex Factors ; SEX OF FETUS ; SOWS ; STEROID METABOLISM ; STEROIDOGENESIS ; Swine - metabolism ; Time Factors ; TRUIE ; UTERO ; UTERUS
É parte de: Domestic animal endocrinology, 1995-04, Vol.12 (2), p.179-187
Notas: 9606571
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Descrição: Twenty intact and 25 unilaterally hysterectomized-ovariectomized gilts were used to study the effect of fetal intrauterine position on conceptus development, concentrations of endogenous progesterone (P4) and estrone (E1) in the placenta and endometrium, and steroid hormone concentrations in amniotic and allantoic fluids during gestation. Gilts were hysterectomized at 40, 60, 80, or 100 d of gestation. Placental and endometrial tissues were pooled individually by the intrauterine position of the associated fetus and incubated separately, and concentrations of P4 and E1 in the medium were determined. Uterine status (intact or unilaterally hysterectomized-ovariectomized) did not affect any of the variables measured. Intrauterine position affected fetal and placental weights (P < 0.02 and 0.01, respectively) only at Day 40 of gestation. The weights of female fetuses bordered in utero by two males and their associated placentas were lower than those from other intrauterine positions. Intrauterine position had no effect on placental and endometrial P4 release or on E1, P4, and androgen concentrations in fetal fluids at any stage of gestation. At Day 100 of gestation, placentas associated with fetuses bordered by those of the same opposite sex (P < 0.01). This study indicates that intrauterine position in swine has a limited effect on conceptus development and on placental and endometrial steroidogenic activity.
Editor: United States: Elsevier Inc
Idioma: Inglês

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Effect of intrauterine position on conceptus development, placental and endometrial release of progesterone and estrone in vitro, and concentration of steroid hormones in fetal fluids throughout gestation in swine

Tarraf, C.G. ; Knight, J.W.

United States: Elsevier Inc

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